From Space Station 13 Wiki
- I do the images on Paint.NET, the process looks like this (enlarged for clarity). Most of the images I made were based on screenshots of glasses of them in my inventory. Since the stripes in the GUI showed up in the screenshots, I also had to take a color picker and recolor so it'd be a more uniform color. Then I'd remove a line of pixels between the top of the glass and the surface of the drink. Some of them were taken on an airbridge, in the arrivals shuttle, or just a regular table with bright lighting; for these, I just had to remove the line.
- I'm glad to say it's not your fault, but the server's. I'm not sure what's happening server-side, but from a few MediaWiki forum posts about similar issues, the code that handles new versions of images hasn't ran yet. You can see this for yourself; notice how the image looks all weird and stretched on the page, but when you actually download it, it's the previous margarita image. In my experience, you just need to wait a few days. You can also readjust the size a bit with NUMBERpx tags on the images, like [[Image.png|16px]].