Strange pattern in glass with light cache

[duncan_hughes]

When I render with the light cache I get a strange pattern showing on the glass (shown on the right hand side of the attached image). If I render with brute force the issue doesnt occur. Any pointers on what I need to do to correct it?

[hermit.crab]

Usually, those blocks are caused by the adaptive dome feature. What V-Ray version build do you have installed? Most of the related issues are already fixed, but they still occur from time to time. Could you send the scene so we can take a look?

[duncan_hughes]

I was on an earlier Vray 6 build but just updated to the lastest hotfix 3 version but ths issue still exists.

I have submitted the scene via the link in your post