rgt.register_node("stone", {
    tiles = {"rgt_stone.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("cobble", {
    tiles = {"rgt_cobble.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("dirt", {
    tiles = {"rgt_dirt.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("dirt_grass", {
    tiles = {"rgt_grass_top.png", "rgt_dirt.png", "rgt_dirt.png^rgt_grass_side.png"},
--    tiles = {"[fill:16x16:0,0:#3e7e7b^[fill:14x14:1,1:#326764"},
    groups = {dig_immediate = 3}
})

rgt.register_node("water", {
    tiles = {"[fill:16x16:0,0:#2d5a7c77^[fill:14x14:1,1:#2d5a7c33"},
    groups = {dig_immediate = 3},
    drawtype = "liquid",
    use_texture_alpha = "blend",
    paramtype = "light",
    walkable = false,
    climbable = true,
    post_effect_color = "#2d5a7c55",
    
    liquidtype = "source",
    -- Minetest pro tip: Do not try to use aliases for these.
    liquid_alternative_source = "red_glazed_terracotta:water",
    liquid_alternative_flowing = "red_glazed_terracotta:water_flowing",
    liquid_viscosity = 1,
    liquid_range = 5,
})

rgt.register_node("water_flowing", {
    tiles = {{name = "[fill:16x16:0,0:#2d5a7c77^[fill:14x14:1,1:#2d5a7c33", backface_culling = false}},
    special_tiles = {{name = "[fill:16x16:0,0:#2d5a7c77^[fill:14x14:1,1:#2d5a7c33", backface_culling = false}, {name = "[fill:16x16:0,0:#2d5a7c77^[fill:14x14:1,1:#2d5a7c33", backface_culling = false}},
    groups = {dig_immediate = 3},
    drawtype = "flowingliquid",
    use_texture_alpha = "blend",
    paramtype = "light",
    paramtype2 = "flowingliquid",
    walkable = false,
    climbable = true,
    post_effect_color = "#2d5a7c55",
    
    liquidtype = "flowing",
    liquid_alternative_source = "red_glazed_terracotta:water",
    liquid_alternative_flowing = "red_glazed_terracotta:water_flowing",
    liquid_viscosity = 1,
    liquid_range = 5,
})

minetest.register_alias("mapgen_stone", "red_glazed_terracotta:stone")
minetest.register_alias("mapgen_water_source", "red_glazed_terracotta:water")


-- Remove
minetest.register_alias("adrift:stone", "red_glazed_terracotta:stone")
minetest.register_alias("adrift:dirt", "red_glazed_terracotta:dirt")
minetest.register_alias("adrift:dirt_grass", "red_glazed_terracotta:dirt_grass")
minetest.register_alias("adrift:water", "red_glazed_terracotta:water")


minetest.register_biome{
    name = "!",

    node_top = "dirt_grass",
    depth_top = 1,

    node_filler = "dirt",
    depth_filler = 5,

    node_riverbed = "dirt",
    depth_riverbed = 3,
    
    node_dungeon = "cobble",
    node_dungeon_alt = "stone",

    
    y_max = alt_max,
    y_min = sealevel,
    vertical_blend = 2,

    heat_point = 50,
    humidity_point = 50,
}