Re-placing the flora and fauna of the existing world, and opening the editor to players.
The vision
Biome does not remake the terrain: it re-places what grows and what lives on it. Vegetation and animals are distributed by procedural scattering, from the biome's data and Season's, with density and rarity calibrated then readjusted through the year.
The same undergrowth therefore does not look alike in April and November, with no seasonal content written by hand.
In the vanilla world, two biomes meet along a line, and the change is sharp to the step. Biome generates real transition zones: a band where both floras blend in a gradient, one thinning out as the other settles in.
It is one of the module's best returns: the world gains a great deal of organic feel for a moderate cost.
The ambition is to assign each biome a default climate profile, a temperature and a humidity: savanna hot and humid, snow cold and very humid, oak forest temperate and moderate. The problem is that Minecraft does not expose those profiles for mod-added biomes.
Two paths coexist rather than exclude each other. A climate tag can be declared in the editor, and failing that the profile is inferred from the biome's contents: sand and dead bushes for hot and dry, snow and ice for cold, water and vines for humid. The inference is cached from the first scan, exposes its confidence level, and the declared tag serves as a clean override when it hesitates.
Small anomalies are seeded at low probability: a clearing, an oasis, a grove that exists nowhere else, with the rare flora or fauna that comes with it. Exploring becomes a way of finding again, not merely of crossing.
The ear is served like the eye. A procedural soundscape can be derived from the climate profile and the fauna present, insects in humid heat, wind in the cold: the ASMR extended to sound.
As elsewhere in the suite, the rules do not stay locked in code. An editor allows composing your own biomes, their flora, their fauna, their scattering rules, and dropping in the trees shaped in Tactile:Wood.