How to Be A Cover Girl after 40

Where I miss half the questions? Both Perceptual and Relative Colorimetric are rendering intents that are strictly of use when converting an image from one profile to another. (With the exception of printing, you may do very little of that, so it may not really matter.) Both are of the greatest value when going from a big-gamut space, like Adobe RGB, to a smaller gamut, like CMYK of all stripes. The easiest way to think of Perceptual is that it takes all the colors used in the big gamut and scales them as a group proportionally to fit inside the smaller gamut. The extreme colors (and even some important mediums like skin tones) might shift, hopefully very slightly. But the relationship between colors remains intact (hence volumetric detail and contouring and depth and all that good stuff). Relative Colorimetric seeks to match each color to its closest equivalent in the source gamut. Which would normally be fine. But Adobe's own advice is very telling: "Recommended for most color conversions, especially when most source colors are already inside the destination gamut." That last part is where things are most likely to go haywire. Here are two extreme scenarios: --Many of your source colors are outside the destination gamut. Perceptual shifts all the colors to compensate, creating a body of smooth transitions. Relative Colorimetric clips the out-of-gamut colors. Perceptual wins. --Few of your source colors are outside the destination gamut. Relative Colorimetric nails the values. Perceptual shifts the colors so little as to go unnoticed. Virtual tie (with slight edge to RC). I generally favor RC for graphic art and Perceptual for photographic. (It's more nuanced than that, but if you're looking for general advice, there it is.) That said, I very much admire Katrin (I cowrote her first book), and I imagine she and Sean have practical evidence to suggest their preference for RC, other than Adobe said so.