I managed to apply CIECAM02 transform on the colors. (This is very slow when compared to the standard color transfer but that is another problem...) Now, how should I set up the CIECAM02 view condition parameters (for lcms) to match with ArgyllCMS (as close as possible)? I currently set these values for the source: vc1.Yb = 20; vc1.La = 100; vc1.surround = 1; I used the same values for all the three ambient light presets except the vc2.surround which is 2,3,4 for Bright,Dim,Dark I think they should be 1,2,3 and I should change the Yb and/or La values. (The lcms documentation is very close-mouthed about CIECAM02. It doesn't even explains what these parameters means and I could find as many symbols as many times I used google to find some informations about this...)