Iliah, I get your point, but, as mentioned by somebody else, it is a known fact that Ufraw does not have a linear behavior. A matrix only profile also works, but it has a quite high error: Profile check complete, peak err = 24.309501, avg err = 2.066699 By removing the "usual" L15 patch the error gets below 15: Profile check complete, peak err = 14.290793, avg err = 1.972512 I have to admit that also the matrix-only profile works quite well with the new settings: it gives extremely similar results to the single shaper one. I probably overlooked it when doing the latest tests. If I try to do the same with the 7D profile, the error gets higher (27 as peak) and even after removing 3 patches it stays to 17. The "bad" patches are always orange/yellow. About all the other replies: of course I am aware that a correct profile may not be visually good. I use proper curves and saturation in ufraw to give the pictures a look that I like (quite neutral, actually, for standard pictures... Then this may change down the other phases of postprocessing). Regards, Alberto Iliah Borg wrote: > I see - but that implies you are fighting non-linearity somewhere, probably > in > the raw converter itself; or your exposures are on the hot side, and you > suffer > sensor highlight non-linearity? -- Home page: http://www.alari.ch/people/alberto Photo galleries : http://albertoferrante.name Public key: http://www.alari.ch/people/alberto/keys/yahoo.asc