Fix legacy water alpha stuff

mods/default/init.lua

@@ -11,11 +11,6 @@ else
   S = function ( s ) return s end
 end
 
-WATER_ALPHA = 160
-WATER_VISC = 1
-LAVA_VISC = 7
-LIGHT_MAX = 14
-
 -- Definitions made by this mod that other mods can use too
 default = {}
 

mods/default/nodes.lua

@@ -12,6 +12,8 @@ else
   F = function ( s ) return minetest.formspec_escape(s) end
 end
 
+local WATER_VISC = 1
+
 minetest.register_node("default:stone", {
 	description = S("stone"),
 	tiles = {"default_stone.png"},
@@ -163,7 +165,7 @@ minetest.register_node("default:water_flowing", {
 			animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=0.8}
 		},
 	},
-	alpha = WATER_ALPHA,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	paramtype2 = "flowingliquid",
 	walkable = false,
@@ -196,7 +198,7 @@ minetest.register_node("default:water_source", {
 			backface_culling = false,
 		}
 	},
-	alpha = WATER_ALPHA,
+	use_texture_alpha = "blend",
 	paramtype = "light",
 	walkable = false,
 	pointable = false,
@@ -229,7 +231,7 @@ minetest.register_node("default:torch", {
 	sunlight_propagates = true,
 	is_ground_content = false,
 	walkable = false,
-	light_source = LIGHT_MAX-1,
+	light_source = 13,
 	selection_box = {
 		type = "wallmounted",
 		wall_top = {-0.1, 0.5-0.6, -0.1, 0.1, 0.5, 0.1},