Vray 3.4 render problem

[koenvdw]

Hi

I just converted to vray 3.4, well I'm testing it.

I was messing around with the light in the corner. Adjusting te intensity and size.
When all of a sudden the rendering really got strange.

As you can see in the picture something is really going wrong and I have no clue whatsoever.

Anybody that can help?

Another question. I made a lot of models in v2. When I try to render these I got really big problems with lightning. I can't get the sun or an HDRI to work. Only made lights work.

Is there something simple to do so that they keep working?

[filibis]

Are you using GPU acceleration and do you have an AMD graphics card? If so it's not going to work as stated in here:

@unknownuser said:

Interactive GPU OpenCL rendering mode is currently not supported.

If you have NVIDIA, try updating your graphics card driver and see if it helps. (Or disable GPU acceleration)

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If you take this scene directly from Vray 2, it might be problematic sometimes. Check this article: Migrating from Previous Versions.