First of all, thank you both for the education! I’m learning so much in these discussions. My mind is constantly being blown in the best possible way. Please know that it is greatly valued! @jedsmith I’ll explore those Nuke swatches to get a better understanding of what’s going on, thank you. I’ll dig into this a bit more before reaching any conclusions.
I did want to say something about the general topic of color shifts and skews in a look transform, since I’ve been one of the folks asking for them. Here I’m thinking of the aesthetic hue shifts, rather than ones for purposes of color appearance modeling.
Regarding those aesthetic hue shifts, the more I work with OpenDRT the more I love it, and what I love about it is the way it faithfully gives back colors without skewing them. I’d hate to lose that in the default look. As an artist the most important thing for me is to be in control of my tool so that I can get the color I want on my “canvas” and that’s exactly what I get with OpenDRT.
Along those lines, I’ve been playing around with grading OpenDRT, and am asking myself if any hue shifts are needed at all? It looks pretty awesome to me without them. With that in mind, I’d like to share some images of OpenDRT with a quick grade I did. This is just a simple grade with no color shifts or skews. This grade is by no means perfect (I keep changing it constantly!), but what it illustrates for me is that it’s pretty easy to get OpenDRT to look awesome without any hue shifts or color skews at all.
On skin tones it is not doing the shift towards yellow/green that a lot of folks were not super happy with in ACES. I might want to play more with the tonemapping to get the specular highlights to pop a bit more, but I think the skin colors in OpenDRT look more natural/realistic.
For fire again while it does not have the saturated yellow of ACES, I think the color it does have looks much closer to what my eye sees i.e. what fire looks like. I think it would of course be reasonable and very doable to have an LMT that emulates ACES 1 (as has been the practice for all previous versions) but personally I hope that the default ACES 2 looks more like natural fire. I believe this in in line with the desire to have the Output Transform be more neutral as opposed to imposing a strong look.
Also that shift from orange to yellow of ACES can be undesirable. For example look what happens to the clouds in this image with ACES compared to OpenDRT: