dark juice
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Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Re: dark juice
But the juice absorption is orders of magnitude 100 times stronger. How can you see transmission color if environment reflects light 10 to 50 times stronger. Disney specularity set to 0.01 and roughness to 0.4 and diffuse to 0.2, even so the specular reflection is dominating.
Re: dark juice
Interesting, is this just bias, or there are indeed more SDS paths inside scattering volume
What a huge time gap between 10 min and 9 hour render. The smaller radius has no scattering volume effects, but renders so long. -------------
EDIT
Nevermind, i got the volume scattering effect to work with small start radius too, using lower scattering asymmetry.
What a huge time gap between 10 min and 9 hour render. The smaller radius has no scattering volume effects, but renders so long. -------------
EDIT
Nevermind, i got the volume scattering effect to work with small start radius too, using lower scattering asymmetry.
- FarbigeWelt
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Re: It is Not the Glass Container, it is the Glass Itself
Revised Material Test
Sun shines directly top down. There is no sky to get neutral colors. Room‘s walls are very dark (0.02,0.02,0.02) to limit indirect light. Room‘s ceiling has an opacity of 0.02 to let sun light in the room.
Cube rows are shifted to avoid shadowing. Different materials are ambiguous now, e.g. pure Glass is without scattering, Juice Glass is with scattering, Null Absorption is without scattering.
Very interesting is Matte Transluscent because it reflects yellow (red+green) and transmits blue (transmission is white, means clear). Null Scattering (yellow) behaves similarly but unfortunately not as nicely as Matte Transluscent.
Based on this materials study I suggest for Orange Juice to define a Mix material of 60% to 70% Glass (transmission yellow, homogeneous volume with absorption light yellow and scattering white with scale 0.5 to 0.95) and 30% to 40% Matte Transluscent (reflection and transmission white): Engine Path with light tracking and PGIC indirect cache (look up radius not less than 1/10 the size of smallest juice object). Engine BiDir, Metropolis (max. con. rejects at least 4096) requires Glass with Heterogeneous Volume (step size 1 to 10 mm, at least 256 iterations).
Light and Word designing Creator - www.farbigewelt.ch - aka quantenkristall || #luxcorerender
MacBook Air with M1
MacBook Air with M1
Re: dark juice
It feels little too yellow and OIDN went very bright, so i post raw image. Absorption has to go down.
Re: dark juice
Caustics shouldn't be yellow?
Re: dark juice
They are in the darker areas, but not from top edge. Can it be the bright light is clamped or overexposed with linear tonemapper, because sun brightness in exr file is 10 000 000 000 or inf (the original hdr usually has floats under 200k).
With gamma 1 it's 10 000 000 000, but with gamma 0.8 it's around 16 000.
- FarbigeWelt
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Re: dark juice
Where do you see caustics beside the ones from the clear glass body? Without dispersion these are hopefully bright white.
Light and Word designing Creator - www.farbigewelt.ch - aka quantenkristall || #luxcorerender
MacBook Air with M1
MacBook Air with M1
Re: dark juice
There is mostly noise of itFarbigeWelt wrote: ↑Thu Aug 22, 2019 3:23 pm Where do you see caustics beside the ones from the clear glass body? Without dispersion these are hopefully bright white.
I see what if i up the absorption and scattering 10 times, maybe the white will be yellow.
Re: dark juice
Yeah, that Cycles example ... tried it many moons ago and it didn't taste any goodlacilaci wrote: ↑Fri Aug 16, 2019 4:04 amI started this thread with comparison to what I get in cycles.
Overall, I prefer Corona's effortless speed & simplicity.
But now I also have LuxCore preset at hand... so all is good & getting better
- FarbigeWelt
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Re: dark juice
If you increase scattering less light passes the volume and volume caustics disappear completely.Fox wrote: ↑Thu Aug 22, 2019 3:33 pmThere is mostly noise of itFarbigeWelt wrote: ↑Thu Aug 22, 2019 3:23 pm Where do you see caustics beside the ones from the clear glass body? Without dispersion these are hopefully bright white.
I see what if i up the absorption and scattering 10 times, maybe the white will be yellow.
Light and Word designing Creator - www.farbigewelt.ch - aka quantenkristall || #luxcorerender
MacBook Air with M1
MacBook Air with M1