I've found that if you upscale your personal Minecraft skin to 512 x 256 (64x32) you can use it. HOWEVER! I wish it was 512x512 so you can add the jacket layer without any problems. To do that, we need to figure out how to add a separate model for jackets only.
I've installed everything correctly with updated CubeUnityShadered (v0.25) - also reinstalled it multiple times to see if that would fix it - and I'm having the same problem as @underhan9900 where only Eren's head renders, I do not know what specific settings I need to check. Here's some Imgur pics:https://imgur.com/duXxWMkhttps://imgur.com/rD2Vn17Please tell me if you need any more screenshots or specifics on what my settings are.I friended you on Discord for assistance before making this post, Mr. El#2628 (colorful background and a flower as the foreground).