Dear Stephen and Iliah, >> "Cannot the problems with shadows/highlights be related with the dynamic >> range of the camera?" >> >> No single exposure of a test chart can fully exercise the dynamic range > > But 2 exposures separated by 4 or 5 EV (depending on the camera) wiil. That was exactly what I was thinking about, Iliah... But how can multiple exposures be merged effectively to generate a camera profile? > I have not yet experienced shadow problems with matrix profiles. My profiles > render shadows too light and I simply apply an RGB tone curve (in the RGB > working space) to darken the shadows, increase contrast in the mid-tones, > smoothly roll-off the highlights and even adjust exposure. I have pretty much the same settings as you at the moment, but I also need quite some saturation to have acceptable visual results. I smooth highlights by using the "film" clipping of ufraw, that is the only method that seems to work well. A the moment, after a number of tests, I decided to use single shaper profiles. Matrix only profile were giving strange results expecially on highlight zones (blue cast). I also tried a LUT profile (-al) that seemed very good, but I soon discovered that all highlights assumed a fluorescent green tint, that is not exactly pleasant. I am now waiting for the colorchecker passport to arrive. Best regards, Alberto -- Home page: http://www.alari.ch/people/alberto Photo galleries : http://albertoferrante.name Public key: http://www.alari.ch/people/alberto/keys/yahoo.asc