Andreas F.X. Siegert wrote: > I think I got fooled by the exposure because of the background. > But even if I push the exposure before generating the linear tiff I get > the overexposed patches. Hmm. Looking at the .tif, white is at around 16%. So the resulting profile will boost everything by a factor of about 600% - which is exactly what it's done. Is this really what you intend ? (Normally you would want to expose the image so white is near 100%.) Graeme Gill.