How do i setup background images for my JSP profile? Is there a specific web image site i can use?

If you go to: Settings --> Profile Settings ( https://forums.d2jsp.org/settings.php?c=33 ) you will have an option named "Use Custom Background Image". If you check it, the options will expand:

- You have to put the direct link image you want as a background, and a bunch of options you can modify such as "Attachment", "Position", "Repeat".
While I cannot give you an advice on which image site/image you should use because I know nothing about graphic designing, I'd recommend you using an image around 1920x1080 px big. Take into account that if you want to see it properly in your screen, you should use an image which the exact same resolution as your screen.
The best move would be to use a standard resolution size so everybody will be able to see it properly (for example, the size I gave above is my resolution).

For specific web image site I'll probably pass the question to some of our graphic artists, they can help you way more than myself.

Best regards!

Imgur.com

Usr what you like and consider using most common resolution image or if you want to really rock that thing, use pattern on x:y repeat so everyone will see a full-screen image. You can also use something that has solid color so it can be set to a background color and fill empty space automatically.

Holy crap, i love it! Thank you to both of you guys!