D00Med's changes 18.1.17

>added mesa biome
>removed velociraptor and trilobite spawns
>added green water

mods/mapgen/mapgen.lua

@@ -865,6 +865,28 @@
 		humidity_point = 0,
 	})
 
+	--Mesa 
+	
+		minetest.register_biome({
+		name = "mesa",
+		node_dust = "default:desert_stone",
+		node_top = "mapgen:granite_brown",
+		depth_top = 3,
+		node_filler = "default:clay",
+		depth_filler = 4,
+		--node_stone = "",
+		--node_water_top = "default:desert_sand",
+		--depth_water_top = 1,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:desert_sand",
+		depth_riverbed = 2,
+		y_min = 1,
+		y_max = 31000,
+		heat_point = 85,
+		humidity_point = 15,
+	})
+	
 	-- Cold desert
 
 	minetest.register_biome({
@@ -981,7 +1003,7 @@
 		--node_stone = "",
 		--node_water_top = "",
 		--depth_water_top = ,
-		--node_water = "",
+		node_water = "mapgen:dirty_water_source",
 		--node_river_water = "",
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
@@ -1071,7 +1093,7 @@ local function register_grass_decoration(offset, scale, length)
 			persist = 0.6
 		},
 		biomes = {"grassland", "grassland_dunes", "deciduous_forest",
-			"coniferous_forest", "coniferous_forest_dunes"},
+			"coniferous_forest", "coniferous_forest_dunes",},
 		y_min = 1,
 		y_max = 31000,
 		decoration = "default:grass_" .. length,

mods/mapgen/nodes.lua

@@ -358,3 +358,108 @@ minetest.register_node("mapgen:vine", {
 	},
 	groups = {cracky=3, dig_immediate=3, oddly_breakeable_by_hand=1},
 })
+
+--code taken from default
+
+--License of source code
+----------------------
+
+--GNU Lesser General Public License, version 2.1
+--Copyright (C) 2011-2016 celeron55, Perttu Ahola <celeron55@gmail.com>
+--Copyright (C) 2011-2016 Various Minetest developers and contributors
+
+
+
+minetest.register_node("mapgen:dirty_water_source", {
+	description = "Dirty Water Source",
+	drawtype = "liquid",
+	tiles = {
+		{
+			name = "default_river_water_source_animated.png^[colorize:green:100",
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 16,
+				aspect_h = 16,
+				length = 2.0,
+			},
+		},
+	},
+	special_tiles = {
+		{
+			name = "default_river_water_source_animated.png^[colorize:green:100",
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 16,
+				aspect_h = 16,
+				length = 2.0,
+			},
+			backface_culling = false,
+		},
+	},
+	alpha = 160,
+	paramtype = "light",
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	is_ground_content = false,
+	drop = "",
+	drowning = 1,
+	liquidtype = "source",
+	liquid_alternative_flowing = "mapgen:dirty_water_flowing",
+	liquid_alternative_source = ",mapgen:dirty_water_source",
+	liquid_viscosity = 2,
+	liquid_renewable = false,
+	liquid_range = 2,
+	post_effect_color = {a = 103, r = 30, g = 76, b = 90},
+	groups = {water = 3, liquid = 3, puts_out_fire = 1, cools_lava = 1},
+	sounds = default.node_sound_water_defaults(),
+})
+
+minetest.register_node("mapgen:dirty_water_flowing", {
+	description = "Flowing Dirty Water",
+	drawtype = "flowingliquid",
+	tiles = {"default_river_water.png^[colorize:green:100"},
+	special_tiles = {
+		{
+			name = "default_river_water_flowing_animated.png^[colorize:green:100",
+			backface_culling = false,
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 16,
+				aspect_h = 16,
+				length = 0.8,
+			},
+		},
+		{
+			name = "default_river_water_flowing_animated.png^[colorize:green:100",
+			backface_culling = true,
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 16,
+				aspect_h = 16,
+				length = 0.8,
+			},
+		},
+	},
+	alpha = 160,
+	paramtype = "light",
+	paramtype2 = "flowingliquid",
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	is_ground_content = false,
+	drop = "",
+	drowning = 1,
+	liquidtype = "flowing",
+	liquid_alternative_flowing = "mapgen:dirty_water_flowing",
+	liquid_alternative_source = "mapgen:dirty_water_source",
+	liquid_viscosity = 1,
+	liquid_renewable = false,
+	liquid_range = 2,
+	post_effect_color = {a = 103, r = 30, g = 76, b = 90},
+	groups = {water = 3, liquid = 3, puts_out_fire = 1,
+		not_in_creative_inventory = 1, cools_lava = 1},
+	sounds = default.node_sound_water_defaults(),
+})

mods/mobs_minetestia/aquatic.lua

@@ -92,7 +92,7 @@ mobs:register_mob("mobs_m:trilobite", {
 	},
 })
 
-mobs:register_spawn("mobs_m:trilobite", {"default:water_source",}, 20, 10, 15000, 2, 11000)
+--mobs:register_spawn("mobs_m:trilobite", {"default:water_source",}, 20, 10, 15000, 2, 11000)
 
 mobs:register_egg("mobs_m:trilobite", "Trilobite", "default_water.png", 1)
 

mods/mobs_minetestia/dinosaurs.lua

@@ -1,7 +1,7 @@
 
 
 --spawns
-mobs:register_spawn("mobs_m:velociraptor", {"default:dirt_with_grass","default:dirt"}, 20, 10, 32000, 2, 31000)
+--mobs:register_spawn("mobs_m:velociraptor", {"default:dirt_with_grass","default:dirt"}, 20, 10, 32000, 2, 31000)
 
 --mobs