minetest.register_biome({
    name           = "Ocean",
    terrain_type   = "normal",

    top_node       = "default:sand",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = 0,

    height_min     = -31000,
    height_max     = -2,
    heat_point     = 40.0,
    humidity_point = 40.0
})

minetest.register_biome({
    name           = "Gravel Ocean",
    terrain_type   = "normal",

    top_node       = "default:gravel",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = 0,

    height_min     = -31000,
    height_max     = -2,
    heat_point     = 0.0,
    humidity_point = 60.0
})

minetest.register_biome({
    name           = "Beach",
    terrain_type   = "normal",

    top_node       = "default:sand",
    top_depth      = 2,
    filler_node    = "default:sandstone",
    filler_height  = -10,

    height_min     = -1,
    height_max     = 2,
    heat_point     = 50.0,
    humidity_point = 10.0
})

minetest.register_biome({
    name           = "Gravel Beach",
    terrain_type   = "normal",

    top_node       = "default:gravel",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = 0,

    height_min     = -1,
    height_max     = 2,
    heat_point     = -10.0,
    humidity_point = 60.0
})

minetest.register_biome({
    name           = "Oceanside",
    terrain_type   = "normal",

    top_node       = "default:dirt",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = 0,

    height_min     = -1,
    height_max     = 2,
    heat_point     = 30.0,
    humidity_point = 30.0
})


minetest.register_biome({
    name           = "Snow Plains",
    terrain_type   = "normal",

    top_node       = "default:dirt_with_snow",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = -15,

    height_min     = 3,
    height_max     = 20,
    heat_point     = -10.0,
    humidity_point = 50.0
})

minetest.register_biome({
    name           = "Plains",
    terrain_type   = "normal",

    top_node       = "default:dirt",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = -15,

    height_min     = 3,
    height_max     = 20,
    heat_point     = 40.0,
    humidity_point = 50.0
})

minetest.register_biome({
    name           = "Hills",
    terrain_type   = "normal",

    top_node       = "default:dirt",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = -15,

    height_min     = 21,
    height_max     = 40,
    heat_point     = 40.0,
    humidity_point = 50.0
})

minetest.register_biome({
    name           = "Snow Hills",
    terrain_type   = "normal",

    top_node       = "default:dirt_with_snow",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = -15,

    height_min     = 21,
    height_max     = 300,
    heat_point     = -10.0,
    humidity_point = 50.0
})

minetest.register_biome({
    name           = "Extreme Hills",
    terrain_type   = "normal",

    top_node       = "default:dirt",
    top_depth      = 2,
    filler_node    = "default:stone",
    filler_height  = -15,

    height_min     = 41,
    height_max     = 300,
    heat_point     = 40.0,
    humidity_point = 40.0
})

minetest.register_biome({
    name           = "Desert",
    terrain_type   = "normal",

    top_node       = "default:desert_sand",
    top_depth      = 2,
    filler_node    = "default:desert_stone",
    filler_height  = -15,

    height_min     = 3,
    height_max     = 15,
    heat_point     = 90.0,
    humidity_point = 0.0
})

--trees
minetest.register_decoration({
    deco_type = "schematic",
    place_on  = "default:dirt_with_grass",
    sidelen   = 8,
    schematic = "treewprob.mts",
    flags     = "place_center_x, place_center_z",
    noise_params = {
        offset  = 0,
        scale   = 0.033,
        spread  = {x=125, y=125, z=125},
        seed    = 2,
        octaves = 4,
        persist = 0.66
    }
})

--papyrus
minetest.register_decoration({
    deco_type  = "simple",
    place_on   = "default:dirt_with_grass",
    sidelen    = 8,
    decoration = "default:papyrus",
    height     = 2,
    height_max = 4,
    noise_params = {
        offset  = -20 / 64,
        scale   = 45 / 64,
        spread  = {x=100, y=100, z=100},
        seed    = 354,
        octaves = 3,
        persist = 0.7
    },
    spawn_by = "default:water_source",
    num_spawn_by = 1
})

--cactuses
minetest.register_decoration({
    deco_type  = "simple",
    place_on   = "default:desert_sand",
    sidelen    = 4,
    decoration = "default:cactus",
    height     = 3,
    height_max = 4,
    noise_params = {
        offset  = -1 / 20,
        scale   = 1 / 15,
        spread  = {x=100, y=100, z=100},
        seed    = 230,
        octaves = 3,
        persist = 0.6
    }
})

--grass
minetest.register_decoration({
    deco_type  = "simple",
    place_on   = "default:dirt_with_grass",
    sidelen    = 4,
    decoration = {
        "default:grass_1",
        "default:grass_2",
        "default:grass_3",
        "default:grass_4",
        "default:grass_5"
    },
    height      = 1,
    noise_params = {
        offset  = 0,
        scale   = 3 / 16, -- originally ^3 as well...
        spread  = {x=100, y=100, z=100},
        seed    = 329,
        octaves = 3,
        persist = 0.6
    }
})

--desert shrubs
minetest.register_decoration({
    deco_type  = "simple",
    place_on   = "default:desert_sand",
    sidelen     = 4,
    decoration = "default:dry_shrub",
    height     = 1,
    noise_params = {
        offset  = 0,
        scale   = 1 / 16, -- originally ^3 as well...
        spread  = {x=100, y=100, z=100},
        seed    = 329,
        octaves = 3,
        persist = 0.6
    }
})