Biomes and atmosphere

Every tier has its own biomes and ambient particles.

Every tier has its own biomes, among them:

Biome	Where
Loose Meadows	Loose Threads
Frayed Woods	Fraying
The Seam and its corners	The Seam
Unstitched Sky	Unstitched
Threadbare void	Threadbare
Roofless Wastes	The Nether
Shattered Rim	The End

Particles

Each biome brings ambient particles that start subtle and grow stronger the further out you go: rising white fibres, drifting ash, red-violet dust off the walls, black specks pulled toward the void.

Bedrock (Geyser) players get a vanilla-looking fallback for every biome and effect.