Cloud

Cloud is a pale grey gaseous material that forms semi-solid cloud formations high above the main world of Noita. It is solid enough for living creatures to walk upon, but allows liquids and dense items like Gold Nuggets to fall through it.

Characteristics
It is the main terrain material of the Cloudscape and The Work (Sky) biomes, and comes in two types, distinguished only by their densities. Both forms of cloud are labelled simply Cloud in-game, and their appearance is quite similar.

As Cloud is a [gas] material, it will be burnt away when the player has the Gas Fire perk, which makes the Cloudscape and The Work (Sky) biomes significantly less navigable.