Displacement added to rock object doesn't work well

[moodflow]

Hey all,

I've been trying to add displacements to the rock object, and it just doesn't seem to work well.  The rock ends up looking like it has holes in it.

Any ideas?

[Hetzen]

Can you give us a picture?

Could too much negative displacement be causing problems?

[Oshyan]

The rock object is indeed a bit unreliable...

- Oshyan

[Henry Blewer]

I use fake stones. They can be made quite huge and still render well.