Strange circular lines on the flat surface

Hi!

I am having a problem with the circular lines which are rendering on the flat surface. In this case I am using an emissive material but I had the same problem on this surface with other materials as well.
I checked the surface and this is just a simple plane which I created in Sketchup.

Would really appreciate your help!


On reyane’s images, it looks like some leftover light with non-smooth fall-off.
robD’s could be similar but the image is too small for me to tell.

Hello,

Thanks for your posts. We couldn’t recreate the problem in our office, so I would ask you to send us the project exhibiting the issue. If you can isolate only the part which reproduces it, please send us just that. This can easily be done by using SketchUp menu’s Extentions > V-Ray > Pack Project. You can send it at support@chaosgroup.com through a file-sharing service of your choice.
Once we investigate it we will be able to assist you further.

Kind regards,
Natali