Cloud is a block type found beneath Floating Islands, along with Rain Cloud blocks. Cloud blocks display as solid blocks, but light passes through them as if they were empty space. On 电脑版, they also negate fall damage similar to Pink Slime Blocks without the bouncing effect. They can be harvested by the player for building translucent structures. Clouds can also be used to make Cloud Walls, or vice versa.
- Clouds can be used in Hellevators to avoid dying from fall damage.
- 电脑版 1.2：引入。
- 主机版 1.02：引入。
- 移动版 1.2.6508：引入。