Roger Breton wrote:
Does it really make a noticeable improvement in the quality of the image when a source gamut is specified, Graeme? As opposed to leaving that information out.
As explained in the documentation, you don't get a perceptual or saturation intent if you leave it out. I don't know about you, but I've noticed quite considerable differences between colorimetric and perceptual intent when mapping between different types of gamuts (RGB to CMYK for instance) !