Vray render black objects

hi i m using sketch up 2017 but the same problem ,could you please help me with this
i m also gettig the same problem,while rendering i m getting black or grey page…i do reversed faces also but not working

How did you do the texture change
I am using Sketchup 2020 and while applying materials from vray they appear completely black in the rendered model

Have you checked the face orientations?

Yes i have checked the face orientation
Here is tbe image of the issue I’m facinh