Yes, Alexander. I already wrote a Little CMS plugin which extends the supported curve types with the mathematical function of the Rec709 curve (and it's inverse function). I set up the original Rec709 Curve parameters. (By the way, I tried to use it --- the exact inverse encode --- in bright room but it looked bad anyway. But never mind, may be it's just me and may be only because I used the pure-power curve for so long...) May be I should try to use CIECAM02 then. But it sounds much easier to set up those three ambient view condition presets with fixed curve parameters. Otherwise, I can't really believe in CIECAM02 here because it's much younger than Rec709. (There is no way that Rec709 has anything to do with CIECAM02. At least officially...) So, I think: If the "scaled inverse encode curve" is really meant to be used on the end-user side, then there should be a commonly accepted/suggested way for this scaling method. (Which had to be exist long before CIECAM02...) And another concern of mine that this curve is well defined but otherwise "hard to scale". It wouldn't make me think that I should use it in a scaled form. (Or where are the scaling formulas and/or the suggested curve parameters then...?") Another idea is to plot the curves and play with the parameters until it looks like this: http://www.avforums.com/forums/9034256-post2.html (Unfortunately his link is dead now. But I can do the same thing with mathcad or excel. I just don't like to do these kind of things myself. -> I am a very bad faker so I am always aware of the fact when I am faking something. And I want it to be done "properly". :D)