This game has provided a lot of "spill-over" inspiration for fertile young minds (read "rabid Counter-Strike fans"). There is a huge online art community dedicated to CS - mostly made up of boys-of-all-ages (well, teenagers mostly) who like to have fun with art programs like Photoshop and 3D Studio MAX. You can find sites for in-game screenshots; for cartoons; to download "sprays" (you can "spraypaint" images in the game), custom weapons models and "skins" (player models - you can play dressed up as anything from Spiderman to the droids in Star Wars); for flash and 3d animations, et cetera... All of it inspired by CS.

And, of course, there are literally thousands of maps to download - created by the players with tools available on the internet. (If your map is well done - if it doesn't lag, has nice textures, nice atmosphere, and works "tactically" - it might [on a big outside chance] get chosen by the CS team for inclusion in the next version.)

(Image by "Cheerioboy" - posted on CS Art: http://art.counter-strike.net/)