So basically when I use my skin which has a layer on top of everything to make a transparent effect it gives a render error I guess, which makes the 1st person POV transparent layer of the skin into a solid color which isn't a big problem but after some people realise this it becomes frustraiting.

Here are some screenshots:

Image of the skin (2nd and 3rd person POV is fine)

Image in 1st person (this is where the bug occurs)

Referring this issue to #21

Is this Iris or Optifine?

Iris latest version, I tried to fix it myself but didn't work.

What version of Super Duper Vanilla is this?

Is the latest version, I tried to re-download the SDV many times but nothing changes
The minecraft version is 1.20.1 Fabric IRIS and the SDV version is 1.3.7

Fixed in 1.3.8 of Super Duper Vanilla, will close this issue once it is released.

Ok, Thank you!