The texture of my hat looks perfectly fine until equipped.
Before
After
It’s even worse on an r6 character
I tried to recreate the UV but no luck, it’s exactly the same.
This is my first time making a hat and I’m pretty new to modelling.
Before
After
Poke! still having this issue 
Texture are compressed on R6. Try it on an r15 rig
Oh wait you did. Umm, its hard to tell anyway. Could be UV sizes?
No idea… how do I check the UV size?