Alright, I was completely sure I had done this right, but something I'm unaware of seems to have gone awry. I finished a decal earlier today, and I was about to test it so I could make touch-ups and release it. However, it seems I've done something so that it doesn't show up in-game. I know the following things to be true;
- The decal is 256x256.
- The thumbnail is 64x64 and is in a folder named "thumbs".
- The main folder is a ZIP file and is named following the file naming format of "Decal_Name.zip".
- The decal is in my add-ons folder.
- The name of the decal contains no spaces, not sure if that matters.
- There is no "server.cs" or "description.txt". I was aware they are unneeded for faces and decals.
- The decal and its thumbnail are in PNG format.
So please, if you have any idea what might be wrong, tell me. It's starting to drive me crazy.