The biome table. Defaults to the 20 built-in BIOMES.
Climate.
Continents.
Ground detail (metres down to decimetres).
Erosion field: flat plains vs rugged land.
Ground materials.
Hills.
Micro relief (decimetres down to millimetres; what an ant walks over).
Height edits applied last (cities flatten their roads and lots here).
Mountains.
Planets: [latitude, longitude] in degrees where World.height (local x/z) is centred.
Planet radius, metres (planets only).
Rivers.
Override-biome rules.
Sea level, metres.
Seed: the same seed and options always give the same world.
Flat world or planet.
Volcanoes.
Every world setting. All plain data: save it, share it, send it to a worker, bind it to a GUI.