Striped render on non-overlapping surfaces

[aumber]

I'm getting striping on my render when materials are not overlapping - they are separated by 2 inches in the model. Quasi Monte-Carlo is my primary engine, Light Cache is secondary. Changing sample sizes and subdivs doesn't seem to make a difference.

I also tried changing the Secondary Ray Bias from 0 to .01 and .001 with no apparent change.

Any ideas would be great

[Micha_cg]

Re: Striped render on non-overlapping surfaces

Please post an image (for example per www.photobucket.com).