This is not a biomes mod. Its not a terrain mod. While it does ad a small number of biomes to fill in gaps, its real goal it not in adding biomes creating interesting terrain, but in improving the way biomes are placed. It completely replaces the vanilla noise maps and biome groups with a system based on a semi-realistic climate model -- realistic enough to feel believable while avoiding being boring or unbalanced in the quantity of biomes. The goal is to make the worlds fun and believable, not to be a slave to realism -- its a game mod, not a scientific model after all.
Biomes can be quite a large or quite small in some situation (example, several of the same biome appear next to each other), but in general biomes are about the same size as vanilla. The will fol
Now supports Biomes O'Plenty, if it sees you got BoP it uses its biomes about 50% of the time (You'll have to wait until when / if I make a fancy config for support for any other biome mods, though.)
TO USE: First install the mod like any other Forge mob (place in mods folder). Then, to start a world based on the mod: go to create new world, then more world options, then click on world type until "World Type: Climatic" comes up -- all other options are the same as vanilla.
TECHNICAL: This was based on some experimenting I was doing on procedurally generating RPG campaign maps. On a technical level it uses attractor points that radiate a certain such as hot, cold, or landiness, creating basins of influence that reach over a large scale. This allows for climate to shift more gradually and less chaotically than with height maps (as in vanilla beta) and noise maps (as in current vanilla). The world is divided into 4096x4096 block continent zones that each get their own climate map -- this is a 2x2 of level 5 map items, or about half the area of the Skyrim map. Each area has a continent or group of large islands -- a universal ocean is guaranteed (great with ships mod).
PLANS: I've actually been cutting back on modding to pursue other interests. However, things like a fancy config system might be added later. For now, this is basically what you get.