Understanding how to interpret and integrate believable surface types and textures into your paintings is a vital part of producing interesting imagery. The digital medium offers endless possibilities; the key is to develop a repertoire of techniques that suits your style.
The key to creating matte surfaces is to remember that they scatter light, literally bouncing it off in every conceivable direction.
Dirt and dust reduce the reflective properties of all surfaces—transforming them from shiny to matte. Dust also adds a subtle but effective texture, somewhat blunting the scene. Floating dust allows shafts of light to be seen.
A surface that was once shiny but is ...