Applying texture to a flat surface, or flatly applying a texture across a whole image (as a means to age it or degrade it) is simple stuff. Realistically applying a texture to an uneven surface is much more hands-on (more so than simply overlaying a texture and changing the Blending mode).
Added on 2011-01-26 11:52:12
Added on 2009-07-03 11:06:12
Added on 2013-05-21 08:19:19