Clouds are visible as a varied stripe moving against the background that straddles world coordinates y = 123(upper) and 122(lower).
All rain and snow falls from these two layers, and neither falls above them.
Suitable blocks at the lower cloud layer or below will stop rain and snow reaching the area beneath them. Barriers include solid blocks and water.
Puddles, snow, and moss can form as high as the upper cloud layer, while ice and snow blocks can form on the lower.
- Water blocks (puddles) form in 1x1 holes with a dirt floor and dirt walls.
- Moss forms on rock and cobblestone.
- Ice replaces water.
- Snow forms on most surfaces.
- Snow blocks replace snow given walls, and can pile as deep as the walls allow.