vray material - using translucency causing light leaks

[stevesideas]

I really need to resolve this issue I have with a translucent material. It is a glass panel and I seem to be getting light leaks at only the top of the panel. Ive made sure the geometry does not intersect with the piece above it. Everything else in the scene is fine, just these panels with this material.

Any ideas on how to get rid of this error ?

[jacksc02]

It almost looks like a smoothing issue.
Have you tried using the retrace threshold?

[stevesideas]

I have, but my render times go up by so much it isn't practical.

[jacksc02]

Does it clean it up though?
Have you tried using brute force?

[stevesideas]

It seems turning off "use lightcache for glossys" sorted the problem.