Horror Mod Catalyst: Spruce World

A combination behavior-resource near-vanilla environmental mod (this mod requires experimental beta API to be activated)

This is the base for any great horror mod-pack:

Alone in the never-ending woods, the fog closes in, sounds arise from the silence,

what lies beyond the trees? Only one way to know.

note: this doesn't actually add any horror monsters, only environment (fog, forest world gen, structures, longer day night cycle, rainy weather)