So I upgraded last night to 4.3.1 and while playing Hymn ( https://www.doomworld.com/idgames/level ... Ports/hymn ) I noticed that the torch got borked in the recent update. This is how it made some parts of E1M4 look like: https://i.imgur.com/5yTWjmN.png I'm using the Enhanced Night Vision option in the screenshot.
I've also noticed that decals seem to render incorrectly, they can be seen through walls: https://i.imgur.com/4EEY3To.png
But, now comes the odd part. I tried using the torch again, both the original and the enhanced version on the next map... and it worked fine. When I returned to E1M4 things rendered correctly now. I have no idea what to make of this, or how to reproduce, apart from, I don't know... download the last stable x64 Win build of 4.3.1, leave the default (enhanced) version on, jump straight into the game, and use a torch.