Chaos Corona Forum
General Category => Gallery => Topic started by: cecofuli on 2013-04-03, 23:25:54
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Hi,
my first project done with Corona.
Sorry, the room is not so "cool" ^__^ . But it was just a test to understand how Corona works.
It was an old scene modeled and textured from my friend with VRay.
I just convert from VRay to Corona, change the bed, the pillows and add the blu carpet.
(http://www.francescolegrenzi.com/Works/36_Baby_Room/01_Baby_Room.jpg)
(http://www.francescolegrenzi.com/Works/36_Baby_Room/02_Baby_Room.jpg)
(http://www.francescolegrenzi.com/Works/36_Baby_Room/03_Baby_Room.jpg)
(http://www.francescolegrenzi.com/Works/36_Baby_Room/04_Baby_Room.jpg)
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Super!!!
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To me it looks very nice, like a lot of work has been put into it which paid off. ;)
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hi cecofuli
very nice render :)
render time?
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(*) 9 hours for the first at 6000px (during the night)
(*) 4 hours at 2500 px. But after one hours and half was ok. But the DOF is not very clean.. Look the last picture, on the right side.
I have my machine free, so I run as much as I can.
Usually, in VRay I render 3 hour for these renders.
All resize at 1920px. No noise reduction. Some little post.
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ok thanks
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Why do you say it's not cool? I think it's AWESOME! Everything is perfect - models, textures, materials, lighting. Only one thing bothers me - how do you open the wardrobe that is touching the desk/bed? Also, can you even seat by this desk or is it some crazy moving machine? :)
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I don't know. the 3d model is not mine :) It comes from the company.
Here some WIP.
(*) MSI looks like a VRay GI caustic. So, with high MSI we can see the caustics generated by GI (not caustics from glass)
(*) MSI is a "threshold" and VRay GI caustic is only ON or OFF.
(*) MSI high = more GI caustic = more noise but better quality.
(*) MSI 00 = a lot of firefly
(http://www.francescolegrenzi.com/Works/36_Baby_Room/05_Baby_Room.jpg)
(http://www.francescolegrenzi.com/Works/36_Baby_Room/06_Baby_Room.gif)
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You are right. But it also affects glass caustics. Basically it's pretty much what it says - maximum allowed sample intensity.
btw, just visited your website and I'm speechless.
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Thank you ^__^ I would like to use Corona for some exterior project.
But I'm a little bit worried cause Corona VFB eats a lot of RAM. And my exterior are very complex (I use a lot Multiscatter)
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Don't worry about the multiscatter part, Corona can render instances fast and efficiently (with low memory usage) ;)
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Hi Cecofuli, nice images you have posted here :)
Also....i bought your book years ago!
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I know, but in my test, if I lunch a 5000 px render, Corona uses, just for VFB, 4-5 GB of RAM!
For this scene, Corona eats 14 GB RAM. Too much in my opinion.
I don't know what happen with a scene like this (http://www.francescolegrenzi.com/Works/23_Jochen/05_Hotel/01_Online/01_MASTERPLAN/1400/Masterplan_02_1400.jpg)
But, I have to try ;-)
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yes, I know I'll have to rework VFB in the future... probably with reintroduction of (progressive) bucket rendering and better contrast function/some tonemapping curves. But for now I'm doing more urgent features like IES and DR
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I agree 100% with you! DR and IES are a priority.
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If you could post your settings, maybe something can be done about DoF convergence :)
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(http://www.francescolegrenzi.com/Works/36_Baby_Room/07_Baby_Room.jpg)
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btw by setting internal res. to 1 you'll cut the memory usage to 25%, but you won't get antialiased highlights...
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Maybe for my heavy external project, highlights are not so important ;-) Good to know.
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About that DoF. Try to set PT samples to 4, and random sampler in debug settings to 5D High-D + PRNG. That should get you faster DoF. Also you might not need that high positional sensitivity for HDcache... even 30 is quite enough ;)
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Ok, I'll try in my next project ;-)
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Caustic in vray very approximated because it is calculated by LightCache. Here are a few different algorithm, which allows you to get a much better caustic and even from light sources.
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You can obtain a very detailed caustics in VRay ;-)
(http://www.francescolegrenzi.com/forum/tutorial/vray8_caustic/03_caustic_zoom_800.jpg)
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I too do not think that Corona has better caustics solution than Vray at the moment :)
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I'm not talking about the caustics by photons;). Or it's GI caustic?
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These are a progressive caustics, not GI caustics. LINK (http://www.francescolegrenzi.com/forum/viewtopic.php?f=25&t=161)
About GI caustics, yes, never used in VRay! A lot of fireflies and nothing more.
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Since the glass is black I am guess light tracing, or very naive photon mapping? Corona has that too :D http://corona-renderer.com/img/gallery/full/zipper-caustics.jpg
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Keymaster, I don't know. In my ol dthread (in my forum) you can download a videotutorial
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About render settings. Setting a higher lights samples multiplier could speed things up? Yes? No?
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About render settings. Setting a higher lights samples multiplier could speed things up? Yes? No?
maybe ;)
(if there are no portals involved)
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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.
(http://www.francescolegrenzi.com/Temp/135_PT_Samples.jpg)
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...
(http://www.francescolegrenzi.com/Temp/136_HD_vs_Alpha3.jpg)
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:
(http://www.francescolegrenzi.com/Temp/137_PT05_vs_PT25.jpg)
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
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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 ;)
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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.
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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!
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I see... ok... thanks for the tests non the less... :) seems like DoF and similar effects will still need some more optimizations :)
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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
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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.
(http://www.francescolegrenzi.com/Temp/137_High_rendertime.png)
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Yes, those grainy small spots could be reflection of sun disc. In future, visibility of sun disc in reflections should be disableable.
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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.
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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 ;)