GMod Image compression?

I noticed it ALWAYS saves the images as .JPG, and the quality ALWAYS suck.

Can I change it so it saves the images as .PNG instead, so I might get a magnificent quality buff?

Don’t think so, but you can write “jpeg_quality 100” to the console before taking the pic.

How much will it improve quality?

I haven’t noticed anything, I don’t have a clue about image qualities, but people say it improves a lot.