Shirt Decal Having a Black Mark and Ruining Design

  1. What do you want to achieve? Keep it simple and clear!
    I am creating a naval based game and am working on the engineer’s shirt. I use Paint 3D.

  2. What is the issue? Include screenshots / videos if possible!
    There is a black mark where the torso is and it ruins the color scheme up.
    Screenshots:
    image
    image

  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    I didn’t find any solutions. Firstly I tried to place it on a red part to make sure it wasn’t my image that was faulty. I also checked the body colours of the humanoid.

First check:

Body Colours:
image

Ask me if you want the torso colours. I haven’t been on for a year so I think it may be an update or something. I also suspect something to do with the render but I’m very bad with that type of stuff. Please help so I can continue with my game.