I think their idea of the biome being able to change the world to fit it is a bit backwards. Personally I would have let the world change the biome, such as letting high mountains generate a snow biome, water proximity generate rainforests and so on.
EVE Online characters:
Daedalus II ex-CEO TOGOA, Daedalus III slave of Daedalus II
Little Molok Asura Engineer
"Trying is the first step towards failiure" - Homer Simpson