From 0dc1aec50940140e28f434c524296e284e73d623 Mon Sep 17 00:00:00 2001
From: RealBadAngel <maciej.kasatkin@yahoo.com>
Date: Fri, 21 Mar 2014 01:32:00 +0100
Subject: [PATCH] Normal maps generation on the fly. Parallax mapping with
 slope information. Overriding normal maps.

---
 builtin/mainmenu.lua                          |  28 ++-
 .../shaders/alpha_shader/opengl_fragment.glsl | 181 +++++++++-------
 .../shaders/alpha_shader/opengl_vertex.glsl   |  40 ++--
 .../leaves_shader/opengl_fragment.glsl        | 154 +++++++++-----
 .../shaders/leaves_shader/opengl_vertex.glsl  |  21 +-
 .../liquids_shader/opengl_fragment.glsl       | 149 ++++++++-----
 .../shaders/liquids_shader/opengl_vertex.glsl |  67 +++++-
 .../plants_shader/opengl_fragment.glsl        | 148 ++++++++-----
 .../shaders/plants_shader/opengl_vertex.glsl  |  21 +-
 .../solids_shader/opengl_fragment.glsl        | 200 ++++++++++--------
 .../shaders/solids_shader/opengl_vertex.glsl  |  40 ++--
 minetest.conf.example                         |   8 +
 src/defaultsettings.cpp                       |   7 +-
 src/game.cpp                                  |   5 +-
 src/mapblock_mesh.cpp                         |  56 +++--
 src/shader.cpp                                |  44 +++-
 16 files changed, 735 insertions(+), 434 deletions(-)

diff --git a/builtin/mainmenu.lua b/builtin/mainmenu.lua
index ad8b37ee..e9c8e813 100644
--- a/builtin/mainmenu.lua
+++ b/builtin/mainmenu.lua
@@ -723,6 +723,9 @@ function tabbuilder.handle_settings_buttons(fields)
 	if fields["cb_parallax"] then
 		engine.setting_set("enable_parallax_occlusion", fields["cb_parallax"])
 	end
+	if fields["cb_generate_normalmaps"] then
+		engine.setting_set("generate_normalmaps", fields["cb_generate_normalmaps"])
+	end
 	if fields["cb_waving_water"] then
 		engine.setting_set("enable_waving_water", fields["cb_waving_water"])
 	end
@@ -1010,27 +1013,30 @@ function tabbuilder.tab_settings()
 					.. dump(engine.setting_getbool("enable_shaders")) .. "]"..
 			"button[1,4.5;2.25,0.5;btn_change_keys;".. fgettext("Change keys") .. "]"
 
-if engine.setting_getbool("enable_shaders") then
-	tab_string = tab_string ..
+	if engine.setting_getbool("enable_shaders") then
+		tab_string = tab_string ..
 			"checkbox[8,0.5;cb_bumpmapping;".. fgettext("Bumpmapping") .. ";"
 					.. dump(engine.setting_getbool("enable_bumpmapping")) .. "]"..
 			"checkbox[8,1.0;cb_parallax;".. fgettext("Parallax Occlusion") .. ";"
 					.. dump(engine.setting_getbool("enable_parallax_occlusion")) .. "]"..
-			"checkbox[8,1.5;cb_waving_water;".. fgettext("Waving Water") .. ";"
+			"checkbox[8,1.5;cb_generate_normalmaps;".. fgettext("Generate Normalmaps") .. ";"
+					.. dump(engine.setting_getbool("generate_normalmaps")) .. "]"..
+			"checkbox[8,2.0;cb_waving_water;".. fgettext("Waving Water") .. ";"
 					.. dump(engine.setting_getbool("enable_waving_water")) .. "]"..
-			"checkbox[8,2.0;cb_waving_leaves;".. fgettext("Waving Leaves") .. ";"
+			"checkbox[8,2.5;cb_waving_leaves;".. fgettext("Waving Leaves") .. ";"
 					.. dump(engine.setting_getbool("enable_waving_leaves")) .. "]"..
-			"checkbox[8,2.5;cb_waving_plants;".. fgettext("Waving Plants") .. ";"
+			"checkbox[8,3.0;cb_waving_plants;".. fgettext("Waving Plants") .. ";"
 					.. dump(engine.setting_getbool("enable_waving_plants")) .. "]"
-else
-	tab_string = tab_string ..
+	else
+		tab_string = tab_string ..
 			"textlist[8.33,0.7;4,1;;#888888" .. fgettext("Bumpmapping") .. ";0;true]" ..
 			"textlist[8.33,1.2;4,1;;#888888" .. fgettext("Parallax Occlusion") .. ";0;true]" ..
-			"textlist[8.33,1.7;4,1;;#888888" .. fgettext("Waving Water") .. ";0;true]" ..
-			"textlist[8.33,2.2;4,1;;#888888" .. fgettext("Waving Leaves") .. ";0;true]" ..
-			"textlist[8.33,2.7;4,1;;#888888" .. fgettext("Waving Plants") .. ";0;true]"
+			"textlist[8.33,1.7;4,1;;#888888" .. fgettext("Generate Normalmaps") .. ";0;true]" ..
+			"textlist[8.33,2.2;4,1;;#888888" .. fgettext("Waving Water") .. ";0;true]" ..
+			"textlist[8.33,2.7;4,1;;#888888" .. fgettext("Waving Leaves") .. ";0;true]" ..
+			"textlist[8.33,3.2;4,1;;#888888" .. fgettext("Waving Plants") .. ";0;true]"
 	end
-return tab_string
+	return tab_string
 end
 
 --------------------------------------------------------------------------------
diff --git a/client/shaders/alpha_shader/opengl_fragment.glsl b/client/shaders/alpha_shader/opengl_fragment.glsl
index 6ed00be2..4359a8c8 100644
--- a/client/shaders/alpha_shader/opengl_fragment.glsl
+++ b/client/shaders/alpha_shader/opengl_fragment.glsl
@@ -1,71 +1,110 @@
-uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D useNormalmap;
-
-uniform vec4 skyBgColor;
-uniform float fogDistance;
-uniform vec3 eyePosition;
-
-varying vec3 vPosition;
-varying vec3 eyeVec;
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-varying vec3 tsEyeVec;
-#endif
-
-const float e = 2.718281828459;
-
-void main (void)
-{
-	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
-
-#ifdef USE_NORMALMAPS
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-#endif
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	float height;
-	vec2 tsEye = vec2(tsEyeVec.x,-tsEyeVec.y);
-
-	if (use_normalmap > 0.0) {
-		float map_height = texture2D(normalTexture, uv).a;
-			if (map_height < 1.0){
-				float height = PARALLAX_OCCLUSION_SCALE * map_height - PARALLAX_OCCLUSION_BIAS;
-				uv = uv + height * tsEye;
-			}
-	}
-#endif
-
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap > 0.0) {
-		vec3 base = texture2D(baseTexture, uv).rgb;
-		vec3 vVec = normalize(eyeVec);
-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
-		vec3 R = reflect(-vVec, bump);
-		vec3 lVec = normalize(vVec);
-		float diffuse = max(dot(lVec, bump), 0.0);
-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
-	} else {
-		color = texture2D(baseTexture, uv).rgb;
-	}
-#else
-	color = texture2D(baseTexture, uv).rgb;
-#endif
-
-	float alpha = texture2D(baseTexture, uv).a;
-	vec4 col = vec4(color.r, color.g, color.b, alpha);
-	col *= gl_Color;
-	col = col * col; // SRGB -> Linear
-	col *= 1.8;
-	col.r = 1.0 - exp(1.0 - col.r) / e;
-	col.g = 1.0 - exp(1.0 - col.g) / e;
-	col.b = 1.0 - exp(1.0 - col.b) / e;
-	col = sqrt(col); // Linear -> SRGB
-	if(fogDistance != 0.0){
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
-		col = mix(col, skyBgColor, d);
-	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
-}
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 tsEyeVec;
+varying vec3 lightVec;
+varying vec3 tsLightVec;
+
+bool normalTexturePresent = false;
+
+const float e = 2.718281828459;
+
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		normalTexturePresent = true;
+	}
+#endif
+
+#ifdef ENABLE_PARALLAX_OCCLUSION
+	if (normalTexturePresent){
+		vec3 tsEye = normalize(tsEyeVec);
+		float height = PARALLAX_OCCLUSION_SCALE * texture2D(normalTexture, uv).a - PARALLAX_OCCLUSION_BIAS;
+		uv = uv + texture2D(normalTexture, uv).z * height * vec2(tsEye.x,-tsEye.y);
+	}
+#endif
+
+#ifdef USE_NORMALMAPS
+	if (normalTexturePresent){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	} 
+#endif
+		
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	vec4 col = vec4(color.rgb, base.a);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		col = mix(col, skyBgColor, d);
+	}
+    gl_FragColor = vec4(col.rgb, base.a);
+}
diff --git a/client/shaders/alpha_shader/opengl_vertex.glsl b/client/shaders/alpha_shader/opengl_vertex.glsl
index e359955d..356ba2eb 100644
--- a/client/shaders/alpha_shader/opengl_vertex.glsl
+++ b/client/shaders/alpha_shader/opengl_vertex.glsl
@@ -1,27 +1,33 @@
 uniform mat4 mWorldViewProj;
 uniform mat4 mInvWorld;
 uniform mat4 mTransWorld;
+uniform mat4 mWorld;
+
 uniform float dayNightRatio;
 
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
-varying vec3 eyeVec;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 lightVec;
 
-#ifdef ENABLE_PARALLAX_OCCLUSION
 varying vec3 tsEyeVec;
-#endif
+varying vec3 tsLightVec;
+
+const float BS = 10.0;
 
 void main(void)
 {
+	gl_TexCoord[0] = gl_MultiTexCoord0;
 	gl_Position = mWorldViewProj * gl_Vertex;
-	vPosition = (mWorldViewProj * gl_Vertex).xyz;
-	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	vPosition = gl_Position.xyz;
+	worldPosition = (mWorld * gl_Vertex).xyz;
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
 
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	vec3 normal,tangent,binormal;
+	vec3 normal, tangent, binormal;
 	normal = normalize(gl_NormalMatrix * gl_Normal);
-
 	if (gl_Normal.x > 0.5) {
 		//  1.0,  0.0,  0.0
 		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0, -1.0));
@@ -47,25 +53,20 @@ void main(void)
 		tangent  = normalize(gl_NormalMatrix * vec3(-1.0,  0.0,  0.0));
 		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
 	}
-
 	mat3 tbnMatrix = mat3(	tangent.x, binormal.x, normal.x,
 							tangent.y, binormal.y, normal.y,
 							tangent.z, binormal.z, normal.z);
 
-	tsEyeVec = normalize(eyeVec * tbnMatrix);
-#endif
+	lightVec = sunPosition - worldPosition;
+	tsLightVec = lightVec * tbnMatrix;
+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	tsEyeVec = eyeVec * tbnMatrix;
 
 	vec4 color;
-	//color = vec4(1.0, 1.0, 1.0, 1.0);
-
 	float day = gl_Color.r;
 	float night = gl_Color.g;
 	float light_source = gl_Color.b;
 
-	/*color.r = mix(night, day, dayNightRatio);
-	color.g = color.r;
-	color.b = color.r;*/
-
 	float rg = mix(night, day, dayNightRatio);
 	rg += light_source * 2.5; // Make light sources brighter
 	float b = rg;
@@ -90,13 +91,8 @@ void main(void)
 	color = color * color; // SRGB -> Linear
 	if(gl_Normal.y <= 0.5)
 		color *= 0.6;
-		//color *= 0.7;
 	color = sqrt(color); // Linear -> SRGB
-
 	color.a = gl_Color.a;
 
 	gl_FrontColor = gl_BackColor = color;
-
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-
 }
diff --git a/client/shaders/leaves_shader/opengl_fragment.glsl b/client/shaders/leaves_shader/opengl_fragment.glsl
index 31981f9b..1db79807 100644
--- a/client/shaders/leaves_shader/opengl_fragment.glsl
+++ b/client/shaders/leaves_shader/opengl_fragment.glsl
@@ -1,54 +1,100 @@
-uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D useNormalmap;
-
-uniform vec4 skyBgColor;
-uniform float fogDistance;
-uniform vec3 eyePosition;
-
-varying vec3 vPosition;
-varying vec3 eyeVec;
-
-const float e = 2.718281828459;
-
-void main (void)
-{
-	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
-
-#ifdef USE_NORMALMAPS
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-#endif
-
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap > 0.0) {
-		vec3 base = texture2D(baseTexture, uv).rgb;
-		vec3 vVec = normalize(eyeVec);
-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
-		vec3 R = reflect(-vVec, bump);
-		vec3 lVec = normalize(vVec);
-		float diffuse = max(dot(lVec, bump), 0.0);
-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
-	} else {
-		color = texture2D(baseTexture, uv).rgb;
-	}
-#else
-	color = texture2D(baseTexture, uv).rgb;
-#endif
-
-	float alpha = texture2D(baseTexture, uv).a;
-	vec4 col = vec4(color.r, color.g, color.b, alpha);
-	col *= gl_Color;
-	col = col * col; // SRGB -> Linear
-	col *= 1.8;
-	col.r = 1.0 - exp(1.0 - col.r) / e;
-	col.g = 1.0 - exp(1.0 - col.g) / e;
-	col.b = 1.0 - exp(1.0 - col.b) / e;
-	col = sqrt(col); // Linear -> SRGB
-	if(fogDistance != 0.0){
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
-		col = mix(col, skyBgColor, d);
-	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
-}
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 lightVec;
+
+bool normalTexturePresent = false; 
+
+const float e = 2.718281828459;
+ 
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+	
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		normalTexturePresent = true;
+	}
+#endif
+
+#ifdef USE_NORMALMAPS
+	if (normalTexturePresent){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	} 
+#endif
+		
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	vec4 col = vec4(color.rgb, base.a);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		col = mix(col, skyBgColor, d);
+	}
+    gl_FragColor = vec4(col.rgb, base.a);
+}
diff --git a/client/shaders/leaves_shader/opengl_vertex.glsl b/client/shaders/leaves_shader/opengl_vertex.glsl
index 3702b1b5..30ad00b8 100644
--- a/client/shaders/leaves_shader/opengl_vertex.glsl
+++ b/client/shaders/leaves_shader/opengl_vertex.glsl
@@ -1,13 +1,20 @@
 uniform mat4 mWorldViewProj;
 uniform mat4 mInvWorld;
 uniform mat4 mTransWorld;
+uniform mat4 mWorld;
+
 uniform float dayNightRatio;
 uniform float animationTimer;
 
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
+varying vec3 worldPosition;
+
 varying vec3 eyeVec;
+varying vec3 lightVec;
+
+const float BS = 10.0;
 
 #ifdef ENABLE_WAVING_LEAVES
 float smoothCurve( float x ) {
@@ -27,7 +34,7 @@ void main(void)
 
 #ifdef ENABLE_WAVING_LEAVES
 	vec4 pos = gl_Vertex;
-	vec4 pos2 = mTransWorld*gl_Vertex;
+	vec4 pos2 = mWorld*gl_Vertex;
 	pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2.x * 0.01 + pos2.z * 0.01) * 2.0 - 1.0) * 0.4;
 	pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.2;
 	pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.4;
@@ -36,10 +43,13 @@ void main(void)
 	gl_Position = mWorldViewProj * gl_Vertex;
 #endif
 
-	vPosition = (mWorldViewProj * gl_Vertex).xyz;
+	vPosition = gl_Position.xyz;
+	worldPosition = (mWorld * gl_Vertex).xyz;
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
 
+	lightVec = sunPosition - worldPosition;
 	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
-
+	
 	vec4 color;
 	//color = vec4(1.0, 1.0, 1.0, 1.0);
 
@@ -75,13 +85,8 @@ void main(void)
 	color = color * color; // SRGB -> Linear
 	if(gl_Normal.y <= 0.5)
 		color *= 0.6;
-		//color *= 0.7;
 	color = sqrt(color); // Linear -> SRGB
-
 	color.a = gl_Color.a;
 
 	gl_FrontColor = gl_BackColor = color;
-
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-
 }
diff --git a/client/shaders/liquids_shader/opengl_fragment.glsl b/client/shaders/liquids_shader/opengl_fragment.glsl
index cab8d8e0..e4082259 100644
--- a/client/shaders/liquids_shader/opengl_fragment.glsl
+++ b/client/shaders/liquids_shader/opengl_fragment.glsl
@@ -1,54 +1,95 @@
-uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D useNormalmap;
-
-uniform vec4 skyBgColor;
-uniform float fogDistance;
-uniform vec3 eyePosition;
-
-varying vec3 vPosition;
-varying vec3 eyeVec;
-
-const float e = 2.718281828459;
-
-void main (void)
-{
-	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
-
-#ifdef USE_NORMALMAPS
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-#endif
-
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap > 0.0) {
-		vec3 base = texture2D(baseTexture, uv).rgb;
-		vec3 vVec = normalize(eyeVec);
-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
-		vec3 R = reflect(-vVec, bump);
-		vec3 lVec = normalize(vVec);
-		float diffuse = max(dot(vec3(-1.0, -0.4, 0.5), bump), 0.0);
-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
-	} else {
-		color = texture2D(baseTexture, uv).rgb;
-	}
-#else
-	color = texture2D(baseTexture, uv).rgb;
-#endif
-
-	float alpha = gl_Color.a;
-	vec4 col = vec4(color.r, color.g, color.b, alpha);
-	col *= gl_Color;
-	col = col * col; // SRGB -> Linear
-	col *= 1.8;
-	col.r = 1.0 - exp(1.0 - col.r) / e;
-	col.g = 1.0 - exp(1.0 - col.g) / e;
-	col.b = 1.0 - exp(1.0 - col.b) / e;
-	col = sqrt(col); // Linear -> SRGB
-	if(fogDistance != 0.0){
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
-		alpha = mix(alpha, 0.0, d);
-	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
-}
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 tsEyeVec;
+varying vec3 lightVec;
+varying vec3 tsLightVec;
+
+const float e = 2.718281828459;
+ 
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+	
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	}
+#endif
+	
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	float alpha = gl_Color.a;
+	vec4 col = vec4(color.rgb, alpha);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		alpha = mix(alpha, 0.0, d);
+	}
+	gl_FragColor = vec4(color.rgb, alpha);
+}
diff --git a/client/shaders/liquids_shader/opengl_vertex.glsl b/client/shaders/liquids_shader/opengl_vertex.glsl
index e8f18582..9d64ce4e 100644
--- a/client/shaders/liquids_shader/opengl_vertex.glsl
+++ b/client/shaders/liquids_shader/opengl_vertex.glsl
@@ -1,40 +1,84 @@
 uniform mat4 mWorldViewProj;
 uniform mat4 mInvWorld;
 uniform mat4 mTransWorld;
+uniform mat4 mWorld;
+
 uniform float dayNightRatio;
 uniform float animationTimer;
 
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
+varying vec3 worldPosition;
+
 varying vec3 eyeVec;
+varying vec3 lightVec;
+
+varying vec3 tsEyeVec;
+varying vec3 tsLightVec;
+
+const float BS = 10.0;
 
 void main(void)
 {
+	gl_TexCoord[0] = gl_MultiTexCoord0;	
+
 #ifdef ENABLE_WAVING_WATER
 	vec4 pos2 = gl_Vertex;
 	pos2.y -= 2.0;
 	pos2.y -= sin (pos2.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) * WATER_WAVE_HEIGHT
 		+ sin ((pos2.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) / 7.0) * WATER_WAVE_HEIGHT;
 	gl_Position = mWorldViewProj * pos2;
+	vPosition = gl_Position.xyz;
 #else
 	gl_Position = mWorldViewProj * gl_Vertex;
+	vPosition = gl_Position.xyz;
 #endif
 
+	worldPosition = (mWorld * gl_Vertex).xyz;
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
+
+	vec3 normal, tangent, binormal;
+	normal = normalize(gl_NormalMatrix * gl_Normal);
+	if (gl_Normal.x > 0.5) {
+		//  1.0,  0.0,  0.0
+		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0, -1.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
+	} else if (gl_Normal.x < -0.5) {
+		// -1.0,  0.0,  0.0
+		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
+	} else if (gl_Normal.y > 0.5) {
+		//  0.0,  1.0,  0.0
+		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
+	} else if (gl_Normal.y < -0.5) {
+		//  0.0, -1.0,  0.0
+		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0,  0.0,  1.0));
+	} else if (gl_Normal.z > 0.5) {
+		//  0.0,  0.0,  1.0
+		tangent  = normalize(gl_NormalMatrix * vec3( 1.0,  0.0,  0.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
+	} else if (gl_Normal.z < -0.5) {
+		//  0.0,  0.0, -1.0
+		tangent  = normalize(gl_NormalMatrix * vec3(-1.0,  0.0,  0.0));
+		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
+	}
+	mat3 tbnMatrix = mat3(	tangent.x, binormal.x, normal.x,
+							tangent.y, binormal.y, normal.y,
+							tangent.z, binormal.z, normal.z);
+
+	lightVec = sunPosition - worldPosition;
+	tsLightVec = lightVec * tbnMatrix;
 	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
-	vPosition = (mWorldViewProj * gl_Vertex).xyz;
+	tsEyeVec = eyeVec * tbnMatrix;
 
 	vec4 color;
-	//color = vec4(1.0, 1.0, 1.0, 1.0);
-
 	float day = gl_Color.r;
 	float night = gl_Color.g;
 	float light_source = gl_Color.b;
 
-	/*color.r = mix(night, day, dayNightRatio);
-	color.g = color.r;
-	color.b = color.r;*/
-
 	float rg = mix(night, day, dayNightRatio);
 	rg += light_source * 2.5; // Make light sources brighter
 	float b = rg;
@@ -54,10 +98,13 @@ void main(void)
 	color.r = clamp(rg,0.0,1.0);
 	color.g = clamp(rg,0.0,1.0);
 	color.b = clamp(b,0.0,1.0);
+
+	// Make sides and bottom darker than the top
+	color = color * color; // SRGB -> Linear
+	if(gl_Normal.y <= 0.5)
+		color *= 0.6;
+	color = sqrt(color); // Linear -> SRGB
 	color.a = gl_Color.a;
 
 	gl_FrontColor = gl_BackColor = color;
-
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-
 }
diff --git a/client/shaders/plants_shader/opengl_fragment.glsl b/client/shaders/plants_shader/opengl_fragment.glsl
index 31981f9b..817530a8 100644
--- a/client/shaders/plants_shader/opengl_fragment.glsl
+++ b/client/shaders/plants_shader/opengl_fragment.glsl
@@ -1,54 +1,94 @@
-uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D useNormalmap;
-
-uniform vec4 skyBgColor;
-uniform float fogDistance;
-uniform vec3 eyePosition;
-
-varying vec3 vPosition;
-varying vec3 eyeVec;
-
-const float e = 2.718281828459;
-
-void main (void)
-{
-	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
-
-#ifdef USE_NORMALMAPS
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-#endif
-
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap > 0.0) {
-		vec3 base = texture2D(baseTexture, uv).rgb;
-		vec3 vVec = normalize(eyeVec);
-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
-		vec3 R = reflect(-vVec, bump);
-		vec3 lVec = normalize(vVec);
-		float diffuse = max(dot(lVec, bump), 0.0);
-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
-	} else {
-		color = texture2D(baseTexture, uv).rgb;
-	}
-#else
-	color = texture2D(baseTexture, uv).rgb;
-#endif
-
-	float alpha = texture2D(baseTexture, uv).a;
-	vec4 col = vec4(color.r, color.g, color.b, alpha);
-	col *= gl_Color;
-	col = col * col; // SRGB -> Linear
-	col *= 1.8;
-	col.r = 1.0 - exp(1.0 - col.r) / e;
-	col.g = 1.0 - exp(1.0 - col.g) / e;
-	col.b = 1.0 - exp(1.0 - col.b) / e;
-	col = sqrt(col); // Linear -> SRGB
-	if(fogDistance != 0.0){
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
-		col = mix(col, skyBgColor, d);
-	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
-}
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 lightVec;
+
+bool normalTexturePresent = false; 
+
+const float e = 2.718281828459;
+ 
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+	
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	}
+#endif
+		
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	vec4 col = vec4(color.rgb, base.a);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		col = mix(col, skyBgColor, d);
+	}
+    gl_FragColor = vec4(col.rgb, base.a);
+}
diff --git a/client/shaders/plants_shader/opengl_vertex.glsl b/client/shaders/plants_shader/opengl_vertex.glsl
index 7987fc16..a95c2024 100644
--- a/client/shaders/plants_shader/opengl_vertex.glsl
+++ b/client/shaders/plants_shader/opengl_vertex.glsl
@@ -1,13 +1,20 @@
 uniform mat4 mWorldViewProj;
 uniform mat4 mInvWorld;
 uniform mat4 mTransWorld;
+uniform mat4 mWorld;
+
 uniform float dayNightRatio;
 uniform float animationTimer;
 
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
+varying vec3 worldPosition;
+
 varying vec3 eyeVec;
+varying vec3 lightVec;
+
+const float BS = 10.0;
 
 #ifdef ENABLE_WAVING_PLANTS
 float smoothCurve( float x ) {
@@ -23,12 +30,11 @@ float smoothTriangleWave( float x ) {
 
 void main(void)
 {
-
 	gl_TexCoord[0] = gl_MultiTexCoord0;
 
 #ifdef ENABLE_WAVING_PLANTS
 	vec4 pos = gl_Vertex;
-	vec4 pos2 = mTransWorld * gl_Vertex;
+	vec4 pos2 = mWorld * gl_Vertex;
 	if (gl_TexCoord[0].y < 0.05) {
 		pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2.x * 0.1 + pos2.z * 0.1) * 2.0 - 1.0) * 0.8;
 		pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2.x * -0.5 + pos2.z * -0.5) * 2.0 - 1.0) * 0.4;
@@ -38,9 +44,13 @@ void main(void)
 	gl_Position = mWorldViewProj * gl_Vertex;
 #endif
 
-	vPosition = (mWorldViewProj * gl_Vertex).xyz;
-	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	vPosition = gl_Position.xyz;
+	worldPosition = (mWorld * gl_Vertex).xyz;
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
 
+	lightVec = sunPosition - worldPosition;
+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	
 	vec4 color;
 	//color = vec4(1.0, 1.0, 1.0, 1.0);
 
@@ -76,11 +86,8 @@ void main(void)
 	color = color * color; // SRGB -> Linear
 	if(gl_Normal.y <= 0.5)
 		color *= 0.6;
-		//color *= 0.7;
 	color = sqrt(color); // Linear -> SRGB
-
 	color.a = gl_Color.a;
 
 	gl_FrontColor = gl_BackColor = color;
-
 }
diff --git a/client/shaders/solids_shader/opengl_fragment.glsl b/client/shaders/solids_shader/opengl_fragment.glsl
index d81506a4..6370bf50 100644
--- a/client/shaders/solids_shader/opengl_fragment.glsl
+++ b/client/shaders/solids_shader/opengl_fragment.glsl
@@ -1,90 +1,110 @@
-uniform sampler2D baseTexture;
-uniform sampler2D normalTexture;
-uniform sampler2D useNormalmap;
-
-uniform vec4 skyBgColor;
-uniform float fogDistance;
-uniform vec3 eyePosition;
-
-varying vec3 vPosition;
-varying vec3 eyeVec;
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-varying vec3 tsEyeVec;
-#endif
-
-const float e = 2.718281828459;
-
-void main (void)
-{
-	vec3 color;
-	vec2 uv = gl_TexCoord[0].st;
-
-#ifdef USE_NORMALMAPS
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-#endif
-
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	float height;
-	vec2 tsEye = vec2(tsEyeVec.x,-tsEyeVec.y);
-
-	if (use_normalmap > 0.0) {
-		float map_height = texture2D(normalTexture, uv).a;
-			if (map_height < 1.0){
-				float height = PARALLAX_OCCLUSION_SCALE * map_height - PARALLAX_OCCLUSION_BIAS;
-				uv = uv + height * tsEye;
-			}
-	}
-#endif
-
-/* Steep parallax code, for future use
-	if ((parallaxMappingMode == 2.0) && (use_normalmap > 0.0)) {
-		const float numSteps = 40.0;
-		float height = 1.0;
-		float step = 1.0 / numSteps;
-		vec4 NB = texture2D(normalTexture, uv);
-		vec2 delta = tsEye * parallaxMappingScale / numSteps;
-		for (float i = 0.0; i < numSteps; i++) {
-		if (NB.a < height) {
-			height -= step;
-			uv += delta;
-			NB = texture2D(normalTexture, uv);
-		} else {
-			break;
-		}
-		}
-	}
-*/
-
-#ifdef ENABLE_BUMPMAPPING
-	if (use_normalmap > 0.0) {
-		vec3 base = texture2D(baseTexture, uv).rgb;
-		vec3 vVec = normalize(eyeVec);
-		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
-		vec3 R = reflect(-vVec, bump);
-		vec3 lVec = normalize(vVec);
-		float diffuse = max(dot(lVec, bump), 0.0);
-		float specular = pow(clamp(dot(R, lVec), 0.0, 1.0),1.0);
-		color = mix (base,diffuse*base,1.0) + 0.1 * specular * diffuse;
-	} else {
-		color = texture2D(baseTexture, uv).rgb;
-	}
-#else
-	color = texture2D(baseTexture, uv).rgb;
-#endif
-
-	float alpha = texture2D(baseTexture, uv).a;
-	vec4 col = vec4(color.r, color.g, color.b, alpha);
-	col *= gl_Color;
-	col = col * col; // SRGB -> Linear
-	col *= 1.8;
-	col.r = 1.0 - exp(1.0 - col.r) / e;
-	col.g = 1.0 - exp(1.0 - col.g) / e;
-	col.b = 1.0 - exp(1.0 - col.b) / e;
-	col = sqrt(col); // Linear -> SRGB
-	if(fogDistance != 0.0){
-		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
-		col = mix(col, skyBgColor, d);
-	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
-}
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D useNormalmap;
+
+uniform vec4 skyBgColor;
+uniform float fogDistance;
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 tsEyeVec;
+varying vec3 lightVec;
+varying vec3 tsLightVec;
+
+bool normalTexturePresent = false; 
+
+const float e = 2.718281828459;
+ 
+float intensity (vec3 color){
+	return (color.r + color.g + color.b) / 3.0;
+}
+
+float get_rgb_height (vec2 uv){
+	return intensity(texture2D(baseTexture,uv).rgb);
+}
+
+vec4 get_normal_map(vec2 uv){
+	vec4 bump = texture2D(normalTexture, uv).rgba;
+	bump.xyz = normalize(bump.xyz * 2.0 -1.0);
+	bump.y = -bump.y;
+	return bump;
+}
+
+void main (void)
+{
+	vec3 color;
+	vec4 bump;
+	vec2 uv = gl_TexCoord[0].st;
+	bool use_normalmap = false;
+	
+#ifdef USE_NORMALMAPS
+	if (texture2D(useNormalmap,vec2(1.0,1.0)).r > 0.0){
+		normalTexturePresent = true;
+	}
+#endif
+
+#ifdef ENABLE_PARALLAX_OCCLUSION
+	if (normalTexturePresent){
+		vec3 tsEye = normalize(tsEyeVec);
+		float height = PARALLAX_OCCLUSION_SCALE * texture2D(normalTexture, uv).a - PARALLAX_OCCLUSION_BIAS;
+		uv = uv + texture2D(normalTexture, uv).z * height * vec2(tsEye.x,-tsEye.y);
+	}
+#endif
+
+#ifdef USE_NORMALMAPS
+	if (normalTexturePresent){
+		bump = get_normal_map(uv);
+		use_normalmap = true;
+	} 
+#endif
+		
+#ifdef GENERATE_NORMALMAPS
+	if (use_normalmap == false){
+		float tl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float t  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float tr = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y+SAMPLE_STEP));
+		float r  = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y));
+		float br = get_rgb_height (vec2(uv.x+SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float b  = get_rgb_height (vec2(uv.x,uv.y-SAMPLE_STEP));
+		float bl = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y-SAMPLE_STEP));
+		float l  = get_rgb_height (vec2(uv.x-SAMPLE_STEP,uv.y));
+		float dX = (tr + 2.0 * r + br) - (tl + 2.0 * l + bl);
+		float dY = (bl + 2.0 * b + br) - (tl + 2.0 * t + tr);
+		bump = vec4 (normalize(vec3 (dX, -dY, NORMALMAPS_STRENGTH)),1.0);
+		use_normalmap = true;
+	}
+#endif
+
+vec4 base = texture2D(baseTexture, uv).rgba;
+	
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap){
+		vec3 L = normalize(lightVec);
+		vec3 E = normalize(eyeVec);
+		float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); 
+		float diffuse = dot(E,bump.xyz);		
+		color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb;
+	} else {
+		color = base.rgb;
+	}
+#else
+	color = base.rgb;
+#endif
+
+	vec4 col = vec4(color.rgb, base.a);
+	col = col * col; // SRGB -> Linear
+	col *= 1.8;
+	col.r = 1.0 - exp(1.0 - col.r) / e;
+	col.g = 1.0 - exp(1.0 - col.g) / e;
+	col.b = 1.0 - exp(1.0 - col.b) / e;
+	col = sqrt(col); // Linear -> SRGB
+	col *= gl_Color;
+	if(fogDistance != 0.0){
+		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
+		col = mix(col, skyBgColor, d);
+	}
+    gl_FragColor = vec4(col.rgb, base.a);
+}
diff --git a/client/shaders/solids_shader/opengl_vertex.glsl b/client/shaders/solids_shader/opengl_vertex.glsl
index e359955d..356ba2eb 100644
--- a/client/shaders/solids_shader/opengl_vertex.glsl
+++ b/client/shaders/solids_shader/opengl_vertex.glsl
@@ -1,27 +1,33 @@
 uniform mat4 mWorldViewProj;
 uniform mat4 mInvWorld;
 uniform mat4 mTransWorld;
+uniform mat4 mWorld;
+
 uniform float dayNightRatio;
 
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
-varying vec3 eyeVec;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 lightVec;
 
-#ifdef ENABLE_PARALLAX_OCCLUSION
 varying vec3 tsEyeVec;
-#endif
+varying vec3 tsLightVec;
+
+const float BS = 10.0;
 
 void main(void)
 {
+	gl_TexCoord[0] = gl_MultiTexCoord0;
 	gl_Position = mWorldViewProj * gl_Vertex;
-	vPosition = (mWorldViewProj * gl_Vertex).xyz;
-	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	vPosition = gl_Position.xyz;
+	worldPosition = (mWorld * gl_Vertex).xyz;
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
 
-#ifdef ENABLE_PARALLAX_OCCLUSION
-	vec3 normal,tangent,binormal;
+	vec3 normal, tangent, binormal;
 	normal = normalize(gl_NormalMatrix * gl_Normal);
-
 	if (gl_Normal.x > 0.5) {
 		//  1.0,  0.0,  0.0
 		tangent  = normalize(gl_NormalMatrix * vec3( 0.0,  0.0, -1.0));
@@ -47,25 +53,20 @@ void main(void)
 		tangent  = normalize(gl_NormalMatrix * vec3(-1.0,  0.0,  0.0));
 		binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0,  0.0));
 	}
-
 	mat3 tbnMatrix = mat3(	tangent.x, binormal.x, normal.x,
 							tangent.y, binormal.y, normal.y,
 							tangent.z, binormal.z, normal.z);
 
-	tsEyeVec = normalize(eyeVec * tbnMatrix);
-#endif
+	lightVec = sunPosition - worldPosition;
+	tsLightVec = lightVec * tbnMatrix;
+	eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	tsEyeVec = eyeVec * tbnMatrix;
 
 	vec4 color;
-	//color = vec4(1.0, 1.0, 1.0, 1.0);
-
 	float day = gl_Color.r;
 	float night = gl_Color.g;
 	float light_source = gl_Color.b;
 
-	/*color.r = mix(night, day, dayNightRatio);
-	color.g = color.r;
-	color.b = color.r;*/
-
 	float rg = mix(night, day, dayNightRatio);
 	rg += light_source * 2.5; // Make light sources brighter
 	float b = rg;
@@ -90,13 +91,8 @@ void main(void)
 	color = color * color; // SRGB -> Linear
 	if(gl_Normal.y <= 0.5)
 		color *= 0.6;
-		//color *= 0.7;
 	color = sqrt(color); // Linear -> SRGB
-
 	color.a = gl_Color.a;
 
 	gl_FrontColor = gl_BackColor = color;
-
-	gl_TexCoord[0] = gl_MultiTexCoord0;
-
 }
diff --git a/minetest.conf.example b/minetest.conf.example
index 71a945b5..f728d6c8 100644
--- a/minetest.conf.example
+++ b/minetest.conf.example
@@ -173,6 +173,14 @@
 # Set to true to enable textures bumpmapping. Requires shaders enabled.
 #enable_bumpmapping = false
 # Set to true enables parallax occlusion mapping. Requires shaders enabled.
+#generate_normalmaps = false
+# Set to true enables on the fly normalmap generation (Emboss effect).
+# Requires bumpmapping enabled.
+#normalmaps_strength = 0.6
+# Strength of generated normalmaps
+#normalmaps_smooth = 1
+# Defines sampling step of texture (0 - 2) 
+# Higher the value normal maps will be smoother
 #enable_parallax_occlusion = false
 # Scale of parallax occlusion effect
 #parallax_occlusion_scale = 0.08
diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index 6b291bd2..b08d79ae 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -130,8 +130,11 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("preload_item_visuals", "true");
 	settings->setDefault("enable_bumpmapping", "false");
 	settings->setDefault("enable_parallax_occlusion", "false");
-	settings->setDefault("parallax_occlusion_scale", "0.08");
-	settings->setDefault("parallax_occlusion_bias", "0.04");
+	settings->setDefault("generate_normalmaps", "false");
+	settings->setDefault("normalmaps_strength", "0.6");
+	settings->setDefault("normalmaps_smooth", "1");
+	settings->setDefault("parallax_occlusion_scale", "0.06");
+	settings->setDefault("parallax_occlusion_bias", "0.03");
 	settings->setDefault("enable_waving_water", "false");
 	settings->setDefault("water_wave_height", "1.0");
 	settings->setDefault("water_wave_length", "20.0");
diff --git a/src/game.cpp b/src/game.cpp
index 0a9dcfda..761f65f8 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -858,14 +858,17 @@ public:
 		services->setPixelShaderConstant("eyePosition", (irr::f32*)&eye_position, 3);
 		services->setVertexShaderConstant("eyePosition", (irr::f32*)&eye_position, 3);
 
-		// Normal map texture layer
+		// Uniform sampler layers
+		int layer0 = 0;
 		int layer1 = 1;
 		int layer2 = 2;
 		// before 1.8 there isn't a "integer interface", only float
 #if (IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 8)
+		services->setPixelShaderConstant("baseTexture" , (irr::f32*)&layer0, 1);
 		services->setPixelShaderConstant("normalTexture" , (irr::f32*)&layer1, 1);
 		services->setPixelShaderConstant("useNormalmap" , (irr::f32*)&layer2, 1);
 #else
+		services->setPixelShaderConstant("baseTexture" , (irr::s32*)&layer0, 1);
 		services->setPixelShaderConstant("normalTexture" , (irr::s32*)&layer1, 1);
 		services->setPixelShaderConstant("useNormalmap" , (irr::s32*)&layer2, 1);
 #endif
diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index ef05acbb..9cd99fcb 100644
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -1212,20 +1212,25 @@ MapBlockMesh::MapBlockMesh(MeshMakeData *data, v3s16 camera_offset):
 			ITextureSource *tsrc = data->m_gamedef->tsrc();
 			material.setTexture(2, tsrc->getTexture("disable_img.png"));
 			if (enable_bumpmapping || enable_parallax_occlusion) {
-				std::string fname_base = tsrc->getTextureName(p.tile.texture_id);
-				std::string normal_ext = "_normal.png";
-				size_t pos = fname_base.find(".");
-				std::string fname_normal = fname_base.substr(0, pos) + normal_ext;
-
-				if (tsrc->isKnownSourceImage(fname_normal)) {
-					// look for image extension and replace it 
-					size_t i = 0;
-					while ((i = fname_base.find(".", i)) != std::string::npos) {
-						fname_base.replace(i, 4, normal_ext);
-						i += normal_ext.length();
-					}
-					material.setTexture(1, tsrc->getTexture(fname_base));
+				if (tsrc->isKnownSourceImage("override_normal.png")){
+					material.setTexture(1, tsrc->getTexture("override_normal.png"));
 					material.setTexture(2, tsrc->getTexture("enable_img.png"));
+				} else {
+					std::string fname_base = tsrc->getTextureName(p.tile.texture_id);
+					std::string normal_ext = "_normal.png";
+					size_t pos = fname_base.find(".");
+					std::string fname_normal = fname_base.substr(0, pos) + normal_ext;
+
+					if (tsrc->isKnownSourceImage(fname_normal)) {
+						// look for image extension and replace it 
+						size_t i = 0;
+						while ((i = fname_base.find(".", i)) != std::string::npos) {
+							fname_base.replace(i, 4, normal_ext);
+							i += normal_ext.length();
+						}
+						material.setTexture(1, tsrc->getTexture(fname_base));
+						material.setTexture(2, tsrc->getTexture("enable_img.png"));
+					}
 				}
 			}
 			p.tile.applyMaterialOptionsWithShaders(material,
@@ -1368,17 +1373,22 @@ bool MapBlockMesh::animate(bool faraway, float time, int crack, u32 daynight_rat
 		buf->getMaterial().setTexture(2, tsrc->getTexture("disable_img.png"));
 		if (enable_shaders && (enable_bumpmapping || enable_parallax_occlusion))
 			{
-				std::string fname_base,fname_normal;
-				fname_base = tsrc->getTextureName(tile.texture_id);
-				unsigned pos;
-				pos = fname_base.find(".");
-				fname_normal = fname_base.substr (0, pos);
-				fname_normal += "_normal.png";
-				if (tsrc->isKnownSourceImage(fname_normal)){
-					os.str("");
-					os<<fname_normal<<"^[verticalframe:"<<(int)tile.animation_frame_count<<":"<<frame;
-					buf->getMaterial().setTexture(1, tsrc->getTexture(os.str()));
+				if (tsrc->isKnownSourceImage("override_normal.png")){
+					buf->getMaterial().setTexture(1, tsrc->getTexture("override_normal.png"));
 					buf->getMaterial().setTexture(2, tsrc->getTexture("enable_img.png"));
+				} else {
+					std::string fname_base,fname_normal;
+					fname_base = tsrc->getTextureName(tile.texture_id);
+					unsigned pos;
+					pos = fname_base.find(".");
+					fname_normal = fname_base.substr (0, pos);
+					fname_normal += "_normal.png";
+					if (tsrc->isKnownSourceImage(fname_normal)){
+						os.str("");
+						os<<fname_normal<<"^[verticalframe:"<<(int)tile.animation_frame_count<<":"<<frame;
+						buf->getMaterial().setTexture(1, tsrc->getTexture(os.str()));
+						buf->getMaterial().setTexture(2, tsrc->getTexture("enable_img.png"));
+					}
 				}
 			}
 	}
diff --git a/src/shader.cpp b/src/shader.cpp
index d29c9d3a..4006e256 100644
--- a/src/shader.cpp
+++ b/src/shader.cpp
@@ -240,12 +240,20 @@ public:
 			services->setVertexShaderConstant(worldViewProj.pointer(), 4, 4);
 
 		// set transposed world matrix
-		core::matrix4 world = driver->getTransform(video::ETS_WORLD);
-		world = world.getTransposed();
+		core::matrix4 transWorld = driver->getTransform(video::ETS_WORLD);
+		transWorld = transWorld.getTransposed();
 		if(is_highlevel)
-			services->setVertexShaderConstant("mTransWorld", world.pointer(), 16);
+			services->setVertexShaderConstant("mTransWorld", transWorld.pointer(), 16);
+		else
+			services->setVertexShaderConstant(transWorld.pointer(), 8, 4);
+
+		// set world matrix
+		core::matrix4 world = driver->getTransform(video::ETS_WORLD);
+		if(is_highlevel)
+			services->setVertexShaderConstant("mWorld", world.pointer(), 16);
 		else
 			services->setVertexShaderConstant(world.pointer(), 8, 4);
+
 	}
 
 private:
@@ -673,7 +681,33 @@ ShaderInfo generate_shader(std::string name, IrrlichtDevice *device,
 
 	// Create shaders header
 	std::string shaders_header = "#version 120\n";
-	
+
+	if (g_settings->getBool("generate_normalmaps")){
+		shaders_header += "#define GENERATE_NORMALMAPS\n";
+		shaders_header += "#define NORMALMAPS_STRENGTH ";
+		shaders_header += ftos(g_settings->getFloat("normalmaps_strength"));
+		shaders_header += "\n";
+		float sample_step;
+		int smooth = (int)g_settings->getFloat("normalmaps_smooth");
+		switch (smooth){
+		case 0:
+			sample_step = 0.0078125; // 1.0 / 128.0
+			break;
+		case 1:
+			sample_step = 0.00390625; // 1.0 / 256.0
+			break;
+		case 2:
+			sample_step = 0.001953125; // 1.0 / 512.0
+			break;
+		default:
+			sample_step = 0.0078125;
+			break;
+		}
+		shaders_header += "#define SAMPLE_STEP ";
+		shaders_header += ftos(sample_step);
+		shaders_header += "\n";
+	}
+
 	if (g_settings->getBool("enable_bumpmapping"))
 		shaders_header += "#define ENABLE_BUMPMAPPING\n";
 
@@ -685,7 +719,7 @@ ShaderInfo generate_shader(std::string name, IrrlichtDevice *device,
 		shaders_header += "#define PARALLAX_OCCLUSION_BIAS ";
 		shaders_header += ftos(g_settings->getFloat("parallax_occlusion_bias"));
 		shaders_header += "\n";
-		}
+	}
 
 	if (g_settings->getBool("enable_bumpmapping") || g_settings->getBool("enable_parallax_occlusion"))
 		shaders_header += "#define USE_NORMALMAPS\n";