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Re: CGI tech news box

Posted: Mon Mar 04, 2019 9:35 am
by Sharlybg
I'd suggest to ditch the biased caustic branch of PGI in favour of this.
As Dade said before this method isn't feasable on GPU. but could be interesting for Cpu based engine like Bidir and CPU path.

Re: CGI tech news box

Posted: Sat Mar 09, 2019 11:34 am
by kintuX
epilectrolytics wrote: Mon Mar 04, 2019 7:30 am Thanks for that link!
Apparently this is accelerating unbiased path tracing including SDS paths.
If it is feasible to implement this I'd suggest to ditch the biased caustic branch of PGI in favour of this.
Hardly so.
I doubt we'll see it in Lux anytime in next couple of years. Priorities changed in favor of fast and cheap - arch. interior eyecandies. While a small group of dev. can't do much, myself alone inapt (being foremost an artist, programming is damn hard / respect to dev.) i just accepted the fact: Quality (precise, complex, feature rich light sim) is a thing of the past here, but maybe with appleseed is the future... ;) So i swim on.

& BTW
Houdini 17.5 Launch Event 8-)

Re: CGI tech news box

Posted: Sat Mar 09, 2019 1:19 pm
by epilectrolytics
kintuX wrote: Sat Mar 09, 2019 11:34 amPriorities changed in favor of fast and cheap - arch. interior eyecandies.
Quality (precise, complex, feature rich light sim) is a thing of the past here
Thanks for your answer.
I'm not that pessimistic :)
The foray into fast interior rendering with version 2.2 is welcome to me even if that's not my specialty.
And the good thing about PGI is that it can also be used for unbiased rendering by guiding the sampling strategy.
I'm still hoping that this will be given a shot after the indirect cache version is completed.

The current implementation of the caustic cache is not finished, we'll have to wait how that will turn out.
As with all photon mappers the initial settings are problematic.
While experimenting with this I came to the personal conclusion that I really want a progressive unbiased caustic engine capable of doing SDS paths.
But that's apparently one of the most tricky things ever, no one has a working version (there are papers but no finished engines).
But if this is somehow possible I'm confident Dade will do it sooner or later.
I don't think users interested in precision and accuracy are abandoned only because those preferring speed currently get much (deserved) attention.
LuxCore can do both ways.

Re: CGI tech news box

Posted: Mon Mar 11, 2019 12:42 pm
by kintuX
epilectrolytics wrote: Sat Mar 09, 2019 1:19 pm
kintuX wrote: Sat Mar 09, 2019 11:34 amPriorities changed in favor of fast and cheap - arch. interior eyecandies.
Quality (precise, complex, feature rich light sim) is a thing of the past here
Thanks for your answer.
I'm not that pessimistic :)
The foray into fast interior rendering with version 2.2 is welcome to me even if that's not my specialty.
And the good thing about PGI is that it can also be used for unbiased rendering by guiding the sampling strategy.
I'm still hoping that this will be given a shot after the indirect cache version is completed.

The current implementation of the caustic cache is not finished, we'll have to wait how that will turn out.
As with all photon mappers the initial settings are problematic.
While experimenting with this I came to the personal conclusion that I really want a progressive unbiased caustic engine capable of doing SDS paths.
But that's apparently one of the most tricky things ever, no one has a working version (there are papers but no finished engines).
But if this is somehow possible I'm confident Dade will do it sooner or later.
I don't think users interested in precision and accuracy are abandoned only because those preferring speed currently get much (deserved) attention.
LuxCore can do both ways.
I'm just being realistic, not fooling anyone. I prefer quality, since i deliver quality works, that's all.
Speed kills! ;)

Re: CGI tech news box

Posted: Mon Mar 11, 2019 2:10 pm
by Sharlybg
I'm just being realistic, not fooling anyone. I prefer quality, since i deliver quality works, that's all.
Speed kills! ;)
So something like Bidir + online learning will be great for you :?:
Also Spectral rendering.

Anyway currently the project need to attract more user. And be closer to what is normal today in term of speed and user friendlyness. This doesn't mean quality is left behind ( you can still use Bidir + metropolis on Power threadripper for precision).

Re: CGI tech news box

Posted: Mon Apr 08, 2019 11:41 am
by Sharlybg
Don't know if someone already post this but it seem very promising layered shader model.

https://shuangz.com/projects/layered-sa18/

https://player.vimeo.com/video/289960237

Re: CGI tech news box

Posted: Mon Apr 08, 2019 1:21 pm
by FarbigeWelt
Sharlybg wrote: Mon Apr 08, 2019 11:41 am Don't know if someone already post this but it seem very promising layered shader model.

https://shuangz.com/projects/layered-sa18/

https://player.vimeo.com/video/289960237
Looks lika a must be like that or similar implemented feature goody.

Re: CGI tech news box

Posted: Wed Jun 12, 2019 8:50 am
by lacilaci
Would you really need bidir if we had these caustics for pathOcl?
https://www.youtube.com/watch?v=VBjOfLElY_I

Re: CGI tech news box

Posted: Wed Jun 12, 2019 9:28 am
by Sharlybg
lacilaci wrote: Wed Jun 12, 2019 8:50 am Would you really need bidir if we had these caustics for pathOcl?
https://www.youtube.com/watch?v=VBjOfLElY_I
will be amazing for archviz and product viz for sure.But i think some lux user want lux to be totally unbiased for some specific Scientific modelling approach and very accurate light simulation.

So i will be more likely for giving option for both people :

Very Fast plausible Renderer on PathOCl for Normal User

Solid guided Bidir engine with spectral rendering option for Scientific user


But in term of priority and the current state of the community the normal user things need to be done first and right before moving on specific features.the engine need more user more developer.

Re: CGI tech news box

Posted: Wed Jun 12, 2019 10:11 am
by epilectrolytics
Sharlybg wrote: Wed Jun 12, 2019 9:28 am So i will be more likely for giving option for both people :

Very Fast plausible Renderer on PathOCl for Normal User

Solid guided Bidir engine with spectral rendering option for Scientific user
Agreed.

PGI indirect cache is already in good shape, even for camera animation.
Now the focus is on finalizing, Blender 2.8 integration, then material system improvement in v2.3.

After that something could be done for the lovers of unbiased rendering like pimping up BiDir Corona style with path guiding and 8x speed gain :mrgreen: