GPU noise with thresholds etc. set to 0

V-Ray V-Ray for Maya General
1

Hi all

I’m rendering on the GPU and setting the following to 0:

Max Subdivs
Noise Threshold
Max render time

The render finishes, showing the following last lines in the console:

[2017/Sep/10|18:30:19] V-Ray: Noise threshold lowered to 0.000031 with 7.7 percent active pixels.
[2017/Sep/10|18:30:19] V-Ray: Noise threshold lowered to 0.000015 with 7.7 percent active pixels.
[2017/Sep/10|18:30:20] V-Ray: Noise threshold lowered to 0.000008 with 7.7 percent active pixels.
[2017/Sep/10|18:30:20] V-Ray: Noise threshold lowered to 0.000004 with 7.7 percent active pixels.
[2017/Sep/10|18:30:20] V-Ray: Noise threshold lowered to 0.000002 with 7.7 percent active pixels.
[2017/Sep/10|18:30:20] V-Ray: Final noise threshold set: 0.000000

The image is 8K, with small recessed holes and the holes are still a bit noisey.

However, if I carry out a small limited region of a few of the holes, the render is smooth.

Cheers

Also, if I set the Max Subdivs and Threshold to 0, can I control the render by time only?

2

Can you get us a scene that we can look at?

Yes, in this case the render time should be the only criterion for when the rendering should stop.

3

Thanks for the info.
I can’t send a scene with the CAD data unfortunately, but could send the same scene minus CAD, if that helps?

4

We can try that and hope that it reproduces here too so we can come up with a way to fix it. Would you need ftp access? Alternatively you can send it to support@chaosgroup.com