MrCrayfish's Gun
If you attach a scope to the gun and zoom, it will look like the image.
All kinds of shaders have the same problem

forge-1.16.5-36.2.35
rubidium-0.2.10
oculus-1.2.6
cgm-1.2.6-1.16.5

Same issue on mine

forge-1.16.5-36.2.34
rubidium-0.2.10
oculus-1.2.6
cgm-1.2.6-1.16.5