Mysterious happenings

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contegufo
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Mysterious happenings

Post by contegufo » Mon Sep 07, 2015 4:13 am

Hi

Given that currently cindigo for Mac can only launch an instance at a time, the problem will be fixed soon, the image was first launched with exporter "Render by Indigo" then as "Render to picture viewer".
It all happened almost simultaneously.
After 15 hours are obvious different between the two images.
It seems that do not travel both at the same speed.
You may notice noise still remaining, reflections on the glass is not completed, eccetera.
How do you explain?
Attachments
im1441498182.jpg
15h,31.jpg
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Re: Mysterious happenings

Post by Zom-B » Mon Sep 07, 2015 7:38 am

contegufo wrote:After 15 hours are obvious different between the two images.
Rendering so early testrenders for 15h seems quite... excessive!
Also as explained in other threads, please use PT BiDir for rendering, its the better choice most of the time :)
contegufo wrote:How do you explain?
Best to doublecheck the CPU utilization of C4D vs Indigo, maybe the last one grabs the majority of the CPU time!?
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Re: Mysterious happenings

Post by contegufo » Mon Sep 07, 2015 11:03 am

Hi

If I replace the lights in the ceiling with as many maps IES and the sun with an environment map can get improvements?

Thank you!
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Re: Mysterious happenings

Post by Zom-B » Mon Sep 07, 2015 11:40 am

contegufo wrote:If I replace the lights in the ceiling with as many maps IES and the sun with an environment map can get improvements?
Sorry I don't get that question :?:
Are you referring to renderspeed/noise or general quality improvement of your output?
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Re: Mysterious happenings

Post by contegufo » Mon Sep 07, 2015 8:15 pm

Yes!
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Re: Mysterious happenings

Post by Zom-B » Mon Sep 07, 2015 9:45 pm

contegufo wrote:Yes!
You can't answer to "A or B" question with "yes" mate :)
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Re: Mysterious happenings

Post by contegufo » Tue Sep 08, 2015 4:26 am

Hi

Thank you, I solved the problem.
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Re: Mysterious happenings

Post by Zom-B » Tue Sep 08, 2015 6:34 am

contegufo wrote:Thank you, I solved the problem.
After starting the thread you owe us to tell where the issue was coming from, so other users can learn from it too :)
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Re: Mysterious happenings

Post by contegufo » Tue Sep 08, 2015 9:00 am

Hi

The mysterious problem was temporarily resolved by reinstalling Cinema4DR15 but could not say if Indigo is also co-responsible, or is the fault dell'exporter.
It 'also possible that CPU power is not divided equally.
Mah!
However because the glass windows were not important I removed.
But other problems have appeared........
Attachments
02.jpg
03.jpg
01.jpg
Mac Mini 2011 - 2,3 GHz Intel Core i5
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Re: Mysterious happenings

Post by Silverwing » Wed Sep 09, 2015 12:41 am

Hi contegufo:

I think its not a problem of the calling. Its a sampling artifact that will vanish over time.

Just a general thing.
It would be really nice if you would provide more information to your renders.
The more information you provide the better users like Zom-B can help you :-)

What would be really interesting to know on your last images would be the rendering time and the algorithm you used. If you were using C4D or did export it to the "Standalone" etc.

Cheers,
Raphael
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Oscar J
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Re: Mysterious happenings

Post by Oscar J » Wed Sep 09, 2015 12:50 am

Silverwing is right, it's box noise, an issue that the developers have been working on but not yet completely eliminated. Those little boxes will disappear with longer render time (form my experience they're usually gone once you hit 500 - 1000 spp), or by using MLT if you're impatient (though that will make the normal noise stay longer instead). :)

If you for example want to render two renders over night to equal quality, just set up a rendering queue and put a halt time or halt SPP on each one.
Last edited by Oscar J on Wed Sep 09, 2015 1:09 am, edited 1 time in total.

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Re: Mysterious happenings

Post by Zom-B » Wed Sep 09, 2015 12:57 am

This box noise are (afaik) QMC artifacts, and something that (afaik) GPU rendering will be free of :)

I recently just found a nice workaround how to prevent them quite well!

Instead of using diffuse materials like for walls etc. use a Phong with IOR = 1 and Exponent = 0.
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Re: Mysterious happenings

Post by contegufo » Wed Sep 09, 2015 3:19 am

Hi

The same shot presents artifacts in version of INDIGO 3.8.25.
Using the next version 3.8.26 are absent.
I used these settings: Path with Bidir. SS = 5
Attachments
3.8.26.jpg
Mac Mini 2011 - 2,3 GHz Intel Core i5
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Oscar J
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Re: Mysterious happenings

Post by Oscar J » Wed Sep 09, 2015 3:27 am

I don't think they're completely absent in version 3.8.29. Since the patterns appear sort of randomly, my guess is that you just got lucky this time, or that you rendered for longer. :)

By the way, what tone mapping do you use? I think you could get much better results with for example camera tone mapping.

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contegufo
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Re: Mysterious happenings

Post by contegufo » Wed Sep 09, 2015 3:37 am

I experienced Tone mapping = Camera.
But I think you have a better chance of correction in Photoshop; right?
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