Hand Model Doesn't Render Correctly [Fabric 1.17.1]
In previous versions that I've used (Forge 1.16), the Hand Model that's rendered in first person always renders from the Right/Left Arm Model, however in this version the Hand doesn't match up with the Arm Model and the texture breaks completely if you have a texture sheet bigger or smaller than the Vanilla default of 64x64
What it should look like:

What it actually looks like:

Keep in mind both the vanilla and custom Right Arm Models look the same.
Edit: Another thing I should mention is that I used the convert Vanilla parts tool after writing this and the same thing happened again.
What other mods do you have installed?
- Slight GUI Modifications
- Animatica
- Architectury API
- ARRP
- BetterF3
- CIT Resewn
- Clear Despawn
- Clear Skies
- Cloth API
- Cloth Config API
- Colormatic
- Continuity
- Cursor Mod
- Custom Entity Models
- Custom Splash Screen
- Entity Texture Features
- Fabric API
- Indium
- Iris Shaders
- LambdaBetterGrass
- LambDynamicLights
- Lithium
- Mod Menu
- Not Enough Crashes
- Ok Zoomer
- Phosphor
- Replay Mod
- Sodium
It may be a incompatibility with another mod. Try it without Entity Texture Features, Custom Entity Models and CIT Resewn to see if it works.
Yep, it worked
I tested it some more and it seems to be an issue with Entity Texture Features specifically
I tested it some more and it seems to be an issue with Entity Texture Features specifically
Because Entity Texture Features has a thing where you can add additional parts to your player only in the skin file.