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RGB and RGBA look overexposed
Posted: Fri Apr 20, 2018 8:16 am
by Egert_Kanep
Altough I already found solution to my problem, which was to achieve transparent background, I noticed that RGB and RGBA aov's look super bright. Other passes like direct diffuse and indirect diffuse looked fine.
Re: RGB and RGBA look overexposed
Posted: Fri Apr 20, 2018 8:45 am
by B.Y.O.B.
RGB and RGBA contain the raw film pixel colors before any tonemapping happens.
So their brightness depends entirely on the brightness of your scene lights (e.g. if you lower the sun gain to 0.001 or so, they should be no longer overexposed).
This is intended.
Other AOVs like diffuse, indirect diffuse etc. have a tonemapping pipeline to match the "Combined" AOV (the standard output).
Re: RGB and RGBA look overexposed
Posted: Fri Apr 20, 2018 8:51 am
by Egert_Kanep
Okay, thanks for explaining. I wonder what is the intended use of these non tonemapped aov's? I assume that if I use beauty pass I still get the correct result just with normalized lighting so what could I benefit from those raw passes?
Re: RGB and RGBA look overexposed
Posted: Fri Apr 20, 2018 9:08 am
by B.Y.O.B.
More options for the user.
You can do your own custom tonemapping.
Another idea: render with panoramic camera, save RGB as .exr and you have a custom-made untonemapped HDRI for environment lighting.
(of course, the Combined AOV is HDR, too).