Running on Fabric under 1.16.4, it will conflict with optfine. I don't know if other versions are like this. When I only open optfine and chesttrack, the light and shadow screen will become all white or all black, because I didn't test it. After other versions, even if I change the optfine version, the same is true. If I can, please fix this problem, and there is also a conflict with modmenu.

Will close this for now, if shaders start having issues on current versions feel free to make a new issue.

Could I get a list of mods and the mod versions/shaders used? Can't reproduce any errors on 1.16.5 with optifine and latest chesttracker version, and i can enter the config with modmenu fine.