VRayClipper - Mesh mode bug (Camera Rays Only behavior)

[labulle]

Trying to use VRay Clipper mesh mode for the first time, I found a strange behavior that I suspect being a bug. Using clipper in normal mode, the behavior is normal.

Here is a simple scene to demonstrate the problem, a plane, 4 boxes, one of the boxes being replaced by the clipper in mesh mode.

The plane is reflective, the clipper intersect two boxes and the box in front is refractive.

All objects (even the clipper) have simple VrayMtls applied to them. The clipper material has a yellow diffuse color.



First, without "Camera rays only", the behavior seems normal:



With "Use object material" everything's still fine:


Now, checking "Camera rays only" (I should note that "use object material" checked or not doesn't change anything anymore):



The clipper now shows in reflections and refractions, and even affects GI!

I have found a workaround by plugging a black color map in the opacity of the clipper's VrayMtl. It effectively hides the clipper, but the intersected faces are full black, and I really would like to be able to change the color (like without "use object material" in VrayClipper normal mode):



Any insight on what I'm maybe missing? Is this a bug or expected behavior?

Thanks!

EDIT: tested in VRay 7 Hotfix 1

[hermit.crab]

We already have this issue logged (internal bug-tracker id: VMAX-5758 ). I'll add your report to bump its priority. I'm not sure if there's an elegant workaround - basically, region rendering only the black (cut) parts (without camera rays only).

[labulle]

Thanks! Good to know it's already logged.

Thanks for the bump, I'll manage it the way you suggest.