Screen shot of blocks at height 108 to 112 as a cloud passes through them.
Clouds in Beta are objects that slowly float overhead in the sky. Clouds always float northward, and are visible above-ground during day and night, so it is an easy way to tell direction. A player cannot interact with Clouds in any way, since they are neither blocks nor items.
In fancy graphics mode, they are 3D. In fast graphics mode they are flat.
When a player's camera is above or below clouds, blocks or objects inside or on the other side of those clouds are obscured. When a player's camera is inside clouds, other blocks inside clouds are visible, while blocks outside of clouds are obscured.
Clouds are not visible through a block of glass or leaves while the block is being hit.
sometimes in high maps it is possible to see clouds on a hill or mountain
In fancy graphics, clouds have a fixed thickness, with the bottom at the lower-middle part of height 108, and the top at the lower-middle part of height 112, where 0 is used as the bottommost height where you can place a block and 127 as the highest point.
Clouds can be removed by using a program that supports transparency by opening the .png file up and erasing everything in it, then re-saving.