POV-Ray's crackle pattern - crackle metric/offset
The crackle pattern is one of POV-Ray's most useful and flexible patterns. Because the additional parameters introduced in megapov I made this collection of sample pictures.
The pictures are rendered with POV-Ray 3.5 beta which does not produce the same results as in megapov 0.x with metrics different from 2.
The parameters illustrated here are
"offset" used the following way: