Minecraft – Why is everything bright in the test world

minecraft-java-edition

I have a superflat test world, where I was going to do experiments with mob farms. Except it seems that for some reason, everything is lit up, as if I were building it out of glass. (it gets dark once it turns night though). Everything is perfectly normal in my non-superflat worlds…

Daytime:
Completely enclosed room. Should be totally dark, right? Apparently not.

Nighttime:
Enclosed room at night - as you can see, there is a discrepancy.

Any ideas? Or is this probably a bug?

Best Answer

If you are running on preview 12w07, lighting was not calculated properly, this was fixed in a later version. If not it may be that it was generated in this preview and has the same issue. Try placing a light source to force a lighting update.