Help with difficult indoor lighting

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pixie
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Re: Help with difficult indoor lighting

Post by pixie » Sat Oct 15, 2016 7:33 am

arc en ciel wrote:
Zom-B wrote: Last idea is to give MLT another try raising the XYZ (forgot Name) value with default of 0.25 up to 0.85 vor higher!
With that you lose the cloudy Boise MLT generates and geht More PT like Boise Ostern, but without any Boxnoise at all.
The overall uniform noise should then be killed easy with neatvide.

Since I'm in vacation, I cant give ya the proper namens for the both options above...
these options are :
- Large mutation Probe
- Max change

in my little experience, I put LMB to 0.51 - 0.7 and max change to 0.06-0.095
it's faster, but up these values the noise are more thick, bigger
maybe more easy for denoising in postpro ? I didn't try

here two images examples i ran in july, watch the name of the files for specifications, the big change is about large mutation probe from 0.78 to 1.78
the speed is multiply by 2, but the noise(s size too, the rendering's time does not change
GPU doesn't use MLT so it won't take thees values into consideration, I guess...

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Zom-B
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Re: Help with difficult indoor lighting

Post by Zom-B » Sat Oct 15, 2016 8:11 am

Yes, I was refering to LMP!
You should test a inferior and not such a low bounce Studio setup ;)
Also LMP max is 1.0 and same as the other feature, they are MLT only parameters...
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galinette
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Re: Help with difficult indoor lighting

Post by galinette » Sat Oct 15, 2016 10:24 am

MLT is generally a bad idea for videos, the low frequency noise make it flicker a lot.

For the elevator glass issue, one solution would be increasing the glass reflectivity (refractive index) but this changes the final result and you may not want it. The problem is transparency.
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Re: Help with difficult indoor lighting

Post by galinette » Sat Oct 15, 2016 10:30 am

Subliminal messages to the devs : there is often a problem with noisy glass when the camera side is well lit (such as exterior, or in this case), and the back side is more in the shadow (such as interior). The importance sampling, I suppose, will highly favor transmission, whereas the contribution of reflection is in fine the largest. Having an option to sample with a probability of 0.5 gives a much better result in this case.
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Zom-B
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Re: Help with difficult indoor lighting

Post by Zom-B » Sat Oct 15, 2016 6:30 pm

galinette wrote:MLT is generally a bad idea for videos, the low frequency noise make it flicker a lot.
Using a high LMP value this low frequency noise gets way less!! Give it a try ;)
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Re: Help with difficult indoor lighting

Post by galinette » Sun Oct 16, 2016 8:01 am

Zom-B wrote:
galinette wrote:MLT is generally a bad idea for videos, the low frequency noise make it flicker a lot.
Using a high LMP value this low frequency noise gets way less!! Give it a try ;)
Yes, but I feel you also loose the efficiency of MLT. Is MLT with LMP=1 really more efficient than non-MLT?
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Oscar J
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Re: Help with difficult indoor lighting

Post by Oscar J » Sun Oct 16, 2016 9:49 am

galinette wrote:
Zom-B wrote:
galinette wrote:MLT is generally a bad idea for videos, the low frequency noise make it flicker a lot.
Using a high LMP value this low frequency noise gets way less!! Give it a try ;)
Yes, but I feel you also loose the efficiency of MLT. Is MLT with LMP=1 really more efficient than non-MLT?
The only advantage is that it doesn't have box noise.

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Re: Help with difficult indoor lighting

Post by Zom-B » Mon Oct 17, 2016 3:32 am

galinette wrote:Yes, but I feel you also loose the efficiency of MLT. Is MLT with LMP=1 really more efficient than non-MLT?
with LMP=1 all benefits of MLT are afaik lost, therefore the sweetspot for animations needs to be found, 0,85 has been find for my last animation...
The big benefit is uniform noise and no boxnoise, both needed to let a temporal denoiser work efficiently, for other scenarios this approach might be not usable.
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Oscar J
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Re: Help with difficult indoor lighting

Post by Oscar J » Thu Dec 01, 2016 4:14 am

Congrats on the great results zeit. :)

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Re: Help with difficult indoor lighting

Post by zeitmeister » Thu Dec 01, 2016 7:21 am

Thank you very much!!


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Cheers, David



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Re: Help with difficult indoor lighting

Post by Originalplan® » Fri Dec 02, 2016 7:00 am

Congrats! Supercool project and final product!
And i'm not even into cars...so. 8)

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Re: Help with difficult indoor lighting

Post by zeitmeister » Fri Dec 02, 2016 7:09 am

:D
Thanks to your help guys... great forum, great people!
Cheers, David



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Re: Help with difficult indoor lighting

Post by Polinalkrimizei » Sat Dec 03, 2016 8:44 am

Pure awesomeness! 8)
Really adds something special to the frontpage.

Are you the only Indigo ambassador at your company?
Fantastic work.

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