Sprays
From TF2 Wiki
Sprays are a feature of the PC version of the game by which players can 'spray' their own pictures (Default Key: "T") onto any surface. The image file can be uploaded to your spray list in the multiplayer menu (though note that the image file must be converted into a .vtf file first). There are several sites that offer a variety of TF2 sprays already converted into vtf. format.
Useful gameplay application is almost negligible, though they can sometimes trick the enemy into thinking you have a crouched Sniper , Sentry gun or have placed Sticky Bombs (from a distance) or in some cases even distract the enemy. (See video)
There is a Roundabout way to convert images to the vtf. format, If you have HL 2 deathmatch installed Run deathmatch then Options>Multiplayer choose your sprays, Make a game Exit. now the game made 3 files. In Hife 2 deathmatch>hl2mp>materials>VGUI>logos and UI folders. So just copy the two in logos and the one in UI to team fortress 2>tf>materials>VGUI>logos and UI, Run Tf2 and select your spray
Spray Resources
