red_glazed_terracotta/mods/rgt_world/init.lua

local function rep(tx, size)
    local out = "[combine:"..(size *16).."x"..(size *16)
    for x = 0, size -1 do
        for y = 0, size -1 do
            out = out..":"..(x *16)..","..(y *16).."="..tx
        end
    end
    return out
end

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("path_grass", {
    drawtype = "nodebox",
    node_box = {
        type = "fixed",
        fixed = {
            -0.5, -0.5, -0.5,
             0.5, 7/16,  0.5
        }
    },
    tiles = {"rgt_path_grass_top.png", "rgt_dirt.png", "rgt_dirt.png^rgt_path_grass_side.png"},
--    tiles = {"[fill:16x16:0,0:#3e7e7b^[fill:14x14:1,1:#326764"},
    paramtype = "light",
    sunlight_propagates = false,
    groups = {dig_immediate = 3}
})



rgt.register_node("oak_planks", {
    tiles = {"rgt_oak_planks.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("dark_planks", {
    tiles = {"rgt_dark_planks.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("spruce_planks", {
    tiles = {"rgt_spruce_planks.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("acacia_planks", {
    tiles = {"rgt_acacia_planks.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("redwood_planks", {
    tiles = {"rgt_redwood_planks.png"},
    groups = {dig_immediate = 3}
})

rgt.register_node("birch_planks", {
    tiles = {"rgt_birch_planks.png"},
    groups = {dig_immediate = 3}
})

--minetest.register_decoration {
--    deco_type = "simple",
--    place_on = "dirt_grass",
--    fill_ratio = 0.5,
--    decoration = {"red_glazed_terracotta:oak_planks", "red_glazed_terracotta:spruce_planks", "red_glazed_terracotta:dark_planks", "red_glazed_terracotta:redwood_planks", "red_glazed_terracotta:acacia_planks", "red_glazed_terracotta:birch_planks"}
--}


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,
}