Simply, i changed a snapshot and lost many of my worlds. by this, I mean almost every block disappeared and left weird shadows. I changed back to 1.7.9. and it was still gone. please tell me if it is safe to go to the newest snapshot!
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kumasasa
Snapshots are unsafe, it's a alpha version.
Snapshots will crash, will destroy your worlds.
You have been warned: https://twitter.com/SeargeDP/status/491305003278401536
Downgrading isn't supported. MC-45009