fracture test.

http://forums.odforce.net/index.php?/topic/11651-fracture-test/page__hl__%20crack__fromsearch__1


http://forums.odforce.net/index.php?/topic/11804-wood-crack-effect/page__hl__%20crack__fromsearch__1


http://forums.odforce.net/index.php?/topic/9209-cracks-on-the-ground/page__hl__%20crack__fromsearch__1