Texture art involves designing the surface appearance of characters or objects, usually in 2D but sometimes in 3D. Pixel art uses raster graphics software to edit images at the pixel level. Concept art is a form of illustration used to develop ideas for video games, as well as other industries, by sketching numerous designs of an item, character, or weapon to provide visual development. Background graphics in games set the mood or scene without interaction, like a large arena crowd in an important street fighter match. Video game companies spend significant resources producing advertising like TV spots, artwork, and gameplay videos to promote their games and entice purchases.