Stripes on materials in V-Ray Vision

[Horizon]

Anyone know what causes all these stripes on basic Revit materials inside V-Ray Vision? It happens to most but not all materials.



Here's another view.



Here's an example of the Revit material settings for the standing seam roof:



If I convert the material to a V-Ray material using the AutoGen feature, it will still happen. BUT, if I uncheck "Reflection Color" the stripes go away:




I'd rather not have to mess with any materials or convert them to avoid the stripes. Am I doing something wrong? Is this a bug? It happens on any computer, and even when exported to standalone Vision package.

Video card is RTX 4090.
Revit 2024.

[Ana Lyubenova]

Most probably a V-Ray texture that is not supported in Vision.