Dispalcement problem - need help

renderlessman

Hello good people,
I need your help because I don't know how to solve my problem.
I'm working on SketchUp 14.1.1282 and Vray 2.00.26579.
Yesterday I did a test render on carpet I made with displacement tutorial I found on Youtube.
test render with basic settings
Form me it was enough so I placed it in the scene I prefer.
And now it looks awful because of that black triangles and some weird kind of distortion on the carpet. I like the scene and the light in in but I am certain that some of the settings in the Vray vropt is causing the trouble. Black triangles are ruining my render - HELP!
I did another test render in the same scene but I loaded the defaults vropt settings and the carpet looks good again (but everything else looks not to good imho). Carpet looks good again but the scene doesn't
Can You help me locate the problem so I can use my favourite settings?

jiminy-billy-bob

Try to subdivise the geometry of the carpet.

renderlessman

@jiminy-billy-bob said:

Try to subdivise the geometry of the carpet.

Hello, It is already very subdivided - i used artisan tool - subdivide and subdivide and smooth.
Maybe it is a problem with light cache, i really don't know.