Baby room

[cecofuli]

Ok, to "solve" the DOF noise, I did some test, with different PT samples, PASS and  Random sampler.

In this first  test,  I used:

(*) Default Random sampler = Alpha 3.
(*) MSI = 15
(*) PASS= 250

with different PT samples

(*) PT Samples: 2   = 6 min
(*) PT Samples: 5   = 10 min
(*) PT Samples: 10 = 15 min
(*) PT Samples: 25 = 32 min

Obviously, more samples -> high rendering time -> higher quality.
But the noise inside the DOF, especially near the bright pixel, doesn't' change too much, even after 32 minutes.



In the second test, I tried to change the Random sampler:

(*) MSI = 15
(*) PASS= 250

with same PT samples (2 and 5) an, as Random sampler, Alpha 3 vs 5D High

(*) PT Samples: 2 -  Alpha 3
(*) PT Samples: 2 -  5D High

(*) PT Samples: 5 -  Alpha 3
(*) PT Samples: 5 -  5D High

In this case, no big differences...





Third test, I tried with the same time (32 minutes) but with different PT samples ( 5 vs 25) No big differences. Again, noise in the DOF:




So, I don't know how to improve the noise in the DOF. Maybe only by waiting? But the rest of the image was very clean...  :-(

In attachment the uncompressed image *.TIF

[Ludvik Koutny]

If you do speed comparisons, you should set time limit instead of pass limit and compare results done in same amount of rendertime, because as you can see, amount of PT samples can change time it takes to calculate one pass quite significantly ;)

[cecofuli]

I did this in the third test =)

32 min - PT samples 5
32 min - PT samples 25

Same result. No big differences.

My intention was to know how, in a real scene, PT Samples and Random sampler works together.
And to see if there are some setting to clean up the DOF.
But I had no t luck. DOF still noisier.

[Polymax]

I think that at this point, to get rid of noise in the DOF is not possible, but also very noisy bokeh effect.
I'm talking about real time rendering!

[Ludvik Koutny]

I see...  ok...  thanks for the tests non the less... :)  seems like DoF and similar effects will still need some more optimizations :)

[alexisliza]

Thanks for the tests Francesco and thanks at all the forum. If I have understand more msi = extra details typically in caustics? Because in my scene i have no caustics.. MSI 10

http://forum.corona-renderer.com/index.php/topic,540.0.html

[cecofuli]

Ok, I did a high quality rendering, for a CROP portion of this image

(*) 3 hours
(*) 9 hours
(*) 15 hours

(*) Only after 15 hours and 8400 passes, DOF are near noise free. Obviously, too much
(*)Also, there are some strange reflection with a lot of noise near the windows structure. I don't know what they are.  Maybe sun reflection?
(*) The glossy metal is ok after 3 hours.

[Ludvik Koutny]

Yes, those grainy small spots could be reflection of sun disc. In future, visibility of sun disc in reflections should be disableable.

[Polymax]

My recent tests with DOF have shown that Rawalanche right! I have the best result for the same time receiving with setup PT to 4.

[Ludvik Koutny]

My recent tests with DOF have shown that Rawalanche right! I have the best result for the same time receiving with setup PT to 4.

It is not an universal solution, there may be cases where it will not help ;)