minetest.register_node(":adrift:stone", {
    tiles = {"rgt_cobble.png"},
    groups = {dig_immediate = 3}
})

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

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

minetest.register_node(":adrift: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"
})

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


minetest.register_biome{
    name = "!",

    node_top = "adrift:dirt_grass",
    depth_top = 1,

    node_filler = "adrift:dirt",
    depth_filler = 5,

    node_riverbed = "adrift:dirt",
    depth_riverbed = 3,

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

    heat_point = 50,
    humidity_point = 50,
}