V-Ray RT GPU -> Problems with small meshes

[pixelwerk]

I've run into a problem when using 3.5 and small meshes:

When you scale the mesh, the problems disappear. Even when deleting one of the smaller edgeloops the problem, at least in this area, is gone as well. I've enclosed a simple scene to show the issue

[vlado]

Is it better in a regular render? Does it make a difference if you turn Embree on or off?

Best regards,
Vlado

[pixelwerk]

Is it better in a regular render? Does it make a difference if you turn Embree on or off?

Best regards,
Vlado

With V-Ray RT-CPU as well as Production render it works like a charm. This problem only occurs when using GPU-rendering. I've turned off Embree as well just to check, but didn't have any effect.

Another thing I've realized is that when using the denoiser and having a render-region selected, once I change some value the VFB jumps to the "Effects Result" renderoutpup instead of keeping the "RGB color" that was previously active.

[vladimir.nedev]

This should be fixed in the 2017.04.08 nightly build.
Turns out it was a regression in the 3.5 GPU core compared to the 3.4 version.

Greetings,
Vladimir Nedev