Placing any kind of sign anywhere on a world will cause the clouds in the sky to either disappear or become more transparent. But the sky’s clouds will return back to normal when you exit the sign.

How to Reproduce

1. Go to a world or create a new world.
2. Place down any kind of sign. For example, in the images, I used an oak sign.
3. You’ll find that the sky’s clouds dissappeared or is more transparent.