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pathtracing and directlighting
Posted: Sun Mar 21, 2010 11:51 pm
by ribrahomedesign
hi there.
interior shot with pathtracing ? i know i have mentioned before ,but it is a big issue for me , because architecture
visualization is what i do for living .
I cant do any interior shots with pathtracing the finnished rendering is allways grainy .is it me or is it octane ??
i have a screenshot with pathtracing and one with directlight.
Rico
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 2:01 am
by Hawker
that's normal, pathtracing is more complicated than direct lighting so, too have a great quality with pathtracing, you have to make longer renders.
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 7:30 am
by Sam
Its mainly because there's no MLT and you got glass all over the place
Even at 32'000 samples it would be grainy without it
MLT gonna fix the noise and the fireflies, and light portals gonna speed up the render by like 1.5x to 3x
(based on other render engine I used)
With the current beta its very hard to do archviz, you need to delete all your glass on your windows
And even without glass there's some noise, because of the MLT not being implemented yet
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 9:25 am
by Hawker
1.5 to 3x faster
are you sure of that ? It is from what source ?
because if it is really true, that is really awsome/great...
more quality, less time...
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 10:02 am
by Sam
1.5 to 3x faster
are you sure of that ? It is from what source ?
because if it is really true, that is really awsome/great...
more quality, less time...
Well im speaking about GI (global illumination) portals in biased engines like Vray etc...
They focus the rays to the interior, so if the sun emmit 10'000 rays, instead of having only 10% entering the windows you get like 80% with portals
Its not 1.5x to 3x faster, the samples per second is the same but you got less noise faster
In the end its like if you were rendering faster. It must be the same for pathtracing
Add MLT wich also help having less noise in less time, and you will get a lot of speed improvement
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 1:43 pm
by radiance
Re: pathtracing and directlighting
Posted: Mon Mar 22, 2010 8:08 pm
by understand
ok cool cause i was about to throw my whole room out of the window after seeing rendering some grainy glass. thanks for the tips
Re: pathtracing and directlighting
Posted: Wed Mar 24, 2010 3:42 pm
by RUNNER
Wow great renders how did you do that leather on the sofa.