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[Max] I need help! / Re: corona sky
« on: 2023-01-19, 22:02:22 »Have you ever opened .raw file and applied "linear" profile? It's bit harder to do in Lightroom or ACR (requires switching to much older profile and only then zero-ing attributes), but super easy with Capture One which you use (just select "linear" profile). It would show you the natural color without any tonemapping or post-processing.
It should not be any different if you use similar time of day, angle of looking at sky (not angle of sun), altitude and lower the turbidity.
White Balance between Corona and Cameras is bit tricky, as 6500K gets interpreted very differently by camera makers and raw editors. You might need to tweak this in Corona somewhat to your liking.
Then we're getting in color gamut which can also influence the tint and saturation perception quite a lot. Corona uses internally some generic WideGamut color space, but Corona Framebuffer and 3dsMax itself are not in any way color managed, so getting correct and accurate colors out of it as expected in comparison to well color-managed photo pipeline (mostly AdobeRGB on both sensor capture and raw editor interpretation) is complicated.
Hey Juraj. I'm still trying to understand your answer but there's a couple of things I still don't get. So hopefully you can help me out.
1) Are you saying that if we could see that last photo (the regular one, not the HDR) using a linear profile, the sky would look pale blue as in the renders? Cause I'm not sure about that to be honest.
2) If that's the case though, is it correct to say that the reason for those deep blues on the photo is just the tonemapping?
3) If tonemapping is the reason, does it mean that Corona ACES ouput has way less saturation/contrast than the tonemapping used on this photo? I say that because I can see that you had to add more contrast in order to reproduce those deep blues in corona. I think that one would expect that after the ACES output, renders are very close to photos (the ones straight from the camera) in terms of contrast, saturation, blacks ect. But this seems to not be the case. I still wonder what combination of operator could give me that.
This is a topic that has intrigued me for a while now since my clients always send me reference photos (straight jpg from their cameras) that always have deeper blues than my tonnepamed renders and for some reason I'm not able to achieve the same sky without having to tweak the color, which is not physically accurate in my opinion.
