There is currently a bug within the 1.12.2 version of this mod. If you set your character to be left-handed, the 3d layers will be misaligned in 1st person. I haven't tested with every other version of minecraft except 1.16.5 which doesn't have this bug last time I checked.

Uh yea, the left hand had issues a few times, possible that 1.12 is based on a version with the bug. It will be fixed next 1.12 release (might take some time).

Ah okay, good to know that it'll get patched eventually. Thanks for the amazing work!