Minecraft version: 1.12.2
Wizardry version: 4.3.4
Environment: Singleplayer

Issue details: I grabbed a helmet from the Costumemes Mod and tried to put it on. The game screen turned completely gray and then it crashed. Strangely enough, after that crash it now works fine.

Other mods involved: https://www.curseforge.com/minecraft/mc-mods/costumemes

Link to crash report: https://pastebin.com/M6CW5bPW

There seems to be something wrong with the models in the Costumemes mod. I guess if it works now then that's fine!

Didn't mean to close it, marking as low priority since it seems to have fixed itself. Let me know if it happens again.