addElement(VanillaBiomes.OCEAN, -1, 0.75f).
addElement(VanillaBiomes.MUSHROOM_SHORE, 0.75f, 0.85f).
addElement(VanillaBiomes.MUSHROOM, 0.85f, 1);
// shore
final BiomeSelectorLayer shore =
rivers.clone().
addElement(VanillaBiomes.BEACH, -1, 0.16f).
addElement(VanillaBiomes.RIVER, 0.16f, 1);
// land
final BiomeSelectorLayer land =
new WhittakerLayer(7).