Black splotches in the RGB color and alpha channel with invisible Forest Pack objects

[Alex_M]

I'm getting black splotches over my renders with scattered Forest Pack objects which are invisible to camera. Please check the screenshots below. there's a hedge in front of the camera. The hedge is hidden to the camera only in "Object Properties", but it's still renderable and visible to reflections/refractions. The splotches go away if I delete, hide, or if I disable the "renderable" option, which of course is not good since I need the reflections from the hedge and the GI it creates/blocks. I tried increasing Secondary Ray Bias in V-Ray's settings from 0.00 to 0.001 and then to even 0.02, but it didn't make any difference. I'm using the latest V-Ray and Forest Pack versions.

[svetlin_mihaylov]

Alex_M Try increasing Max transp. levels in V-Ray Tab/Global Switches

[Vizioen]

Nice roof man!

If you have these errors it's mostly due to having Forest Pack (or other scatterer) hidden to the camera or a VrayClipper clipping them. Raising Max Transp Levels to about 500 should fix it.

[Alex_M]

That did the trick! Thank you both.