Render tests have been done on machines locally and on the farm with different specs. Sometimes the render hangs; sometimes it finished with much longer render time than using BF+BF. Maybe it has to do with hardware issues internally, but we can't point our finger to something specifically at the moment.
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Vray fur with light cache and moblur, render extermely slow
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Originally posted by vlado View PostDoes it always hang with the Zumo drive message?
I thought it has to do with accessing/saving LC files, but I got the same issue when I specify a dedicated file path for saving LC file or disable auto-save completely.always curious...
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Originally posted by jasonhuang1115 View PostOn couple boxes I have tested locally, yes. It appears in Maya output window with VRay Log level set to "all messages". I can't say that for rendering on the farm though.
I thought it has to do with accessing/saving LC files, but I got the same issue when I specify a dedicated file path for saving LC file or disable auto-save completely.
Best regards,
VladoI only act like I know everything, Rogers.
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Ok. I guess I will try to render a few frames over and over and see what happens. Can you tell me what is the hardware you are using (CPUs) so that I can match it as close as possible? Also, which OS do you use?
Best regards,
VladoI only act like I know everything, Rogers.
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Hello jasonhuang1115
We have tested your scene on our MAC machine - but unfortunately we couldn't reproduce the issue you have.
Since our MAC is not very powerfull > i5 processor with 8GB of RAM , we have a very slow rendering with 10 strands per face - so we decreased this value to 5 per face.
With these settings - rendertime per frame was between 5 and 6 minutes - and we didn't notice anything suspicious during the rendering.
Unfortunately we do not have anything close to your Mac Configuration in our office and if the bug is related to the hardware we won't be able to reproduce it.
Have you got another Mac machine at your environment with different configuration - perhaps single CPU ? If you have please run the same scene on that machine - and compare the results.
If it is possible please try the following tests on E5520 machine.
-decrease fur-count to 5 per face
-use VrayMtl instead of VrayHairMtl
-activate "Use reTrace Threshold" in Light Cache Parameters
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Thanks for doing the test, Svetlozar. I did a quick test with the production scene (animated character with moblur). With a fairly low Image Sampler setting, the render hangs more than 15 minutes for the Light Cache phase. As soon as the Light Cache phase reaches like 93%, it took a long time to reach 97% and I couldn't wait any longer. I switch the hair material with a Vray material, the whole render took 8 minutes to finish.
If I render a fur ball scene, the scene renders normally with Light Cache and moblur. Interestingly, BF+BF is faster than BF+LC (retrace ON and LC for glossy rays ON). I thought using LC would save render time, but so far it's not the case.
One thing to note is that the production scene has multiple animated meshes for the hero character where only one mesh is visible to the camera. All other meshes for Vray fur and hair material assignment are hidden when rendering.always curious...
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Hello again,
It turned out that we had a dual xeon Mac tower into the office - and finally I managed to reproduce the issue , with the last stable Vray build.
I haven't waited to complete the render - after one hour the render was at 3-4% , and the Light Cache has been calculated for much longer time.
A good news is that this bug doesn't exist in the last Nightly Builds - so if you have access to the Nightly Builds please log in and download one of the last ones - if you haven't got please write to support@chaosgroup.com
Thank you very much for your patience and feedback.
Please let us know about the results of your tests with the Nightly Build version.
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