Mesh artifacts appear when using CUDA or OpenCL

[Pixelperfectg]

I'm getting black artifacts on this imported CAD object when using VRay r/t in GPU mode. Same results with both OpenCL and CUDA. Only when I switch to CPU mode do the artifacts vanish.


Even with a new VRaymtl applied (default settings) the artifacts appear when rendered with a GPU mode. It's not isolated to just one area or mesh either, it's all over the meshes. Unfortunately I just can't show more of the render.

[vlado]

Is this with motion blur or without? How far away from the origin is your model?

Best regards,
Vlado

[Pixelperfectg]

There is no motion blur active. The model is unrealistically scaled, but not to an out of the world/high degree. Meaning, the vehicle is about 1900cm / 748" tall (yikes..I know, but unfortunately I'm not allowed to change the scale). For location, it's centered on the world coordinates 0,0,0.

For the sake of testing I did scale the model down to a realistic value via the xform modifier. Doing so DID decrease the artifacts, but did not completely eliminate them.

[vlado]

How would 1900 cm translate into generic scene units (sorry should have worded this better)? In any case, I really need some way to reproduce this here...

Best regards,
Vlado

[Pixelperfectg]

I really need some way to reproduce this here...

Just sent you an email on this.