In an Editor Extensions test world, it always rains.

Thanks for the report. I checked the rain state machine, but I couldn't find anything that could cause permanent rain in Editor Extensions. There might be a bug somewhere, but I couldn't reproduce it.

If possible, could you share the save file? I'll try to find the root cause

It looks like I was wrong. In my testing, the rain does stop after I sped up the game and waited a while. I suppose I just found it much more noticeable on the blank lab world background.

Ideally you’d add a flag that disables it in the test world if that’s possible, but I suppose you could just disable it in the settings, which I didn’t realize earlier, so it’s not a huge deal.