public function __construct(Random $random, callable $lookup, Biome $fallback)
{
$this->fallback = $fallback;
$this->lookup = $lookup;
$this->temperature = new Simplex($random, 2, 1 / 16, 1 / 512);
$this->rainfall = new Simplex($random, 2, 1 / 16, 1 / 512);
}