So, I logged onto the latest snapshot, backed up, and launched my world. Get into the world, and I'm greeted by clouds. Had to use dropbox to share pictures, couldn't get the upload function to work. https://www.dropbox.com/s/dgi2vjm8wxtj799/Clouds.png?dl=0
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Thank you for your report!
However, this issue is a Duplicate of MC-186064.
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