Vray5 Animated Objects Screed-Lift Reflection/Light Issues On|Off randomly

[DIGITALARTCORE]

Hi All,

I have a problem with the reflections on some animated objects. They go on and off randomly during the animation.
When they are not animated everything works as expected and is fine. I use bucket mode with brute force and light cache (animation preset).
The material is "glossy/reflective" with "BRDF GTR anisotropy". But I have changed this several times without success.

For the general troubleshooting I have tried the following:
Merge into a new scene
Reset and readjust rendering parameters
Playing with the settings "Min/Max / Subdivs / Sample size, etc."
Checked the geometrie of the objects for errors (faces, normals, edges, etc.)
Exclude this objects from the nearby affacting lights.

All without any success - I'm a little bit lost....

It is not flickering on each frame, but randomly switching on and off.
There must be a reason for that.???

Do you have any tip or advice to fix this problem?

Many thanks in advance for your help.

Frank

[DIGITALARTCORE]

Hi Guys,

Fortunately, I have solved the problem.

Despite checking the geometry STL-Check + X-View (faces, normals, edges, vertex) they seemed to be corrupt.

I exported the objecte as *.obj and imported it again. After that a few Reset XForm and collapse it to editable poly.

That does the trick and fixed it.

Cheers,
Frank