This in fact is a thread which has its beginning in the recent ‘bevel shading’ thread. First was the very successful Osl bevel script which Piotr Adamowicz wrote, used afterwards by Bobizib in a node setting for producing a ‘dirt and decay’ effect. The results were astonishingly good, so I thought that this ‘dirt and decay’ producing setting deserves definitely a separate thread of its own. I thin
