View Full Version : Render Noise (dielectric surface)

06-18-2010, 08:09 AM
I'm doing this simple little station ID using the dielectric glass surface under a transparent plane with a ripple displacement map. I was hoping to just crank this out and get it on-air, but I can't fix this problem.

I keep getting render noise in the object only on parts under the transparent plane. The noise flashes and moves around so it's not a particular polygon.

I tried increases the subpatch level of the water plane and it seems to have no effect. I made a lot of changes to the dielectric surface and the only thing that seems to work is to blur the refractions, but I think the noise is still there, just blurred.

I did a search and found similar issues but none of the suggestions seemed to have any effect on my scene.

06-18-2010, 09:44 AM
In the camera panel, try lowering the Threshold to .03 or lower.

06-19-2010, 01:31 PM
isn't your geometry overlapping with the water surface?
if not, maybe you're getting some weird reflection from your backdrop/reflection map?

06-21-2010, 09:00 AM
Yes, it is overlapping geometry. Is there a way to avoid this? I'm not exactly sure how to dynamically clip an object's geometry using another object.