I've fixed the file uploading on the wiki. All registered users should be able to upload pictures.
I've set up these basic rules:
If uploading a screenshot:
Name it: MyAwesomeGame-Screenshot, MyAwesomeGame-Screenshot2, et.c.
You can also give a more descriptive name, e.g. MyAwesomeGame-ScaryZombie
You should use jpg.
If uploading a logo or similar picture:
Name it: MyAwesomeGame-Logo (or whatever it is)
You can use png.
If uploading a tutorial resource:
Name it: Resource-ExplosionFrames (or whatever it is)
You should use png.
Since many files were abducted during the alien raid, there are now a bunch of missing images. If you have access to them, please upload them. Here's a list.
Thank you for flying with Team Unreliable Pollution
Because screenshots are generally large, meaning that they don't need as much precision, so therefore using JPG, which has a powerful lossy compression algorithm, is much better. If your screenshot is a thumbnail, then I recommend using PNG, though.