Find your image, the sizes must be power of 2 and the final file size must not exceed 512kb. Download VTFedit. With VTFedit, Import your own .JPG,.BMP, etc... and convert it to a .VTF file (Valve Texture File) Now place the .VTF file in: (your dir)\Steam\steamapps\common\anysourcegame\team fortress 2\tf\materials\VGUI\logos To fix the quick view appearing blank copy the same .VTF also in: (your dir)\Steam\steamapps\common\anysourcegame\tf\materials\VGUI\logos\UI In game, go to the options and click import the spray and browse for it in the \logos folder (not the UI folder!) and validate. (this will create a VMT file near your VTF) In summary; your .VTF must reside in the last \logos and also \UI folder where you copied it manually, then don't forget to do the step 5, the spray now appear correctly in the list.