spectral rendering
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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.
- Theo_Gottwald
- Posts: 109
- Joined: Fri Apr 24, 2020 12:01 pm
Re: spectral rendering
Can you explain the picture?
From my point of view often when i use dispersion, many of the colours are missing and i get just R,G and B.
From my point of view often when i use dispersion, many of the colours are missing and i get just R,G and B.
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- MetinSeven
- Posts: 137
- Joined: Sun Aug 18, 2019 10:19 am
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Re: spectral rendering
Intriguing. Does this mean that LuxcoreRender yields physically correct dispersion results despite not being a spectral renderer? I'm not very familiar with this field yet.
visualizer • illustrator • animator • 3D designer — metinseven.nl
Re: spectral rendering
I think luxcore only have spectral dispersion.MetinSeven wrote: ↑Wed Oct 21, 2020 7:17 amIntriguing. Does this mean that LuxcoreRender yields physically correct dispersion results despite not being a spectral renderer? I'm not very familiar with this field yet.
BTW appleseed seem to have full spectral rendering but i can see the impact on the appleseed gallery.
https://appleseedhq.net/features.htmlSpectral rendering (31 bands in 400-700 nm)
Re: spectral rendering
Another way to say this is that LuxCore is not a spectral renderer, but it has two spectral materials, namely Glass and the Thin Film Coating. (Granted, the latter is not a material on its own, but still...)
On each glass interaction, the refraction is calculated with dispersion, then a wavelength-to-RGB conversion is done, and what follows is done again in RGB space. See the example of a possible implication I posted here.
In the source code, I also see some spectral stuff in textures, but I think it is just to precompute RGB data based on physical inputs
- MetinSeven
- Posts: 137
- Joined: Sun Aug 18, 2019 10:19 am
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Re: spectral rendering
Looking at the Blenderseed update frequency, I've got the impression that Appleseed is not very alive anymore:
https://github.com/appleseedhq/blenderseed
I also believe that Appleseed is still CPU-only and that there's no macOS support.
visualizer • illustrator • animator • 3D designer — metinseven.nl
Re: spectral rendering
Yes this is the precarity of opensource render engine. Even if there is amazing potential weakness catch up and kill everything.MetinSeven wrote: ↑Wed Oct 21, 2020 8:46 amLooking at the Blenderseed update frequency, I've got the impression that Appleseed is not very alive anymore:
https://github.com/appleseedhq/blenderseed
I also believe that Appleseed is still CPU-only and that there's no macOS support.
This the reason i always say everyone involve in the project should think about way to support :
__ Report Bug
__ Share your Work
__ Donate
__ participate to community life (express your POV)
__ Code even small thing is welcome (addon / core engine)
__ Comment on other Lux work as much as you can on every platform
Don't want to spread fear among but we aren't far from that appleseed current state
- MetinSeven
- Posts: 137
- Joined: Sun Aug 18, 2019 10:19 am
- Location: Netherlands
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Re: spectral rendering
I think the Luxcore devs are doing a fine job with frequent build updates, improving GPU support and a macOS version.
visualizer • illustrator • animator • 3D designer — metinseven.nl
Re: spectral rendering
Yes but all the Core engine stuff is on a single Man since Years now and the addon situation is pretty simillar.MetinSeven wrote: ↑Wed Oct 21, 2020 9:04 amI think the Luxcore devs are doing a fine job with frequent build updates, improving GPU support and a macOS version.
After 3 years of rebirth i don't see any other Developper joinning core engine development.
Userbase is minimal. And even if there 1500 people subscribing to the forum i can count user participating
in the project life.
__Dez
__ MetinSeven
__ Theogottwald
__ Cgvirus
__CodeHD
__Farbigewelt
__b2przemo
__joyasrohrbach
__PDRA
Maybe i forget couple of names but it really doesn't change the picture that much.
It is fixable but not without coordination and communication and clear path definition.
Many are doing a great job exposing and supporting this amazing project but there is lack
of coordination concertation.
- MetinSeven
- Posts: 137
- Joined: Sun Aug 18, 2019 10:19 am
- Location: Netherlands
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Re: spectral rendering
It'd be great if LuxcoreRender gets more recognized among 3D users. It is a truly great renderer, ahead of Cycles in multiple areas.
Once Luxcore gets more user attention, more donations and interested developers will follow.
Once Luxcore gets more user attention, more donations and interested developers will follow.
visualizer • illustrator • animator • 3D designer — metinseven.nl