Changes:
- Added rain weather, so each in-game day has an equal random chance to become sunny, foggy or have rain (can be repeated).
- The rain splashes on surfaces and is accompanied by a looping rain sound, which becomes softer when you're indoors.
- Fog and rain now persists into the night.

Fixes:
- The horizon had a bright pinkish glow at night.
- Atmospheric fog was wrongly used instead of volumetric fog, which caused the fog to be bluish and water surfaces not to be reflected properly in the fog.
- Villagers were always having the second choice in a conversation as the correct answer, because their answer list wasn't fully randomized.