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Attached is a macro set for splitting RGB image into separate layers for a number of colour models. RGB: Basic separation RGBW: New model! Like CMYK but Red, Green, Blue and White RGB-W: Like RGBW but only two layers for separate colour/tone editing CMY: Effective inverse of RGB CMYK: Standard internal model CMY-K: Like CMYK, but with only two layers for separate colour/tone editing HSL: New model! Hue, Saturation and Luminosity on separate layers! HSL-RGB: Same as HSL, but with Hue broken down into separate RGB layers Principles used in doing these: Start with 'Merge Visible' to create flat layer for base (saves tripping over adjustments) End with single layer group (so you can delete it in one go if you don't like it Named layers, so you know which is which Keep it simple (just the layers, no 'edit ready' adjustments such as curves, sharpening) Fast as possible (so RGB done with channels, CMYK with curves, etc), though new ones need Apply Image which can be very slow! Any bugs, etc. please let me know. Do be patient with Apply Image adjustments and don't try to 'Esc' out as this can leave you in limbo. Enjoy! Dave's Colour Models V1.afmacros