I have this photo of a yellow carousel horse which is going into a
folio I'm printing.
This is one of the first times I've run into a serious gamut problem.
My first print attempt, batched up with a number of other photos in
sequence, was set for color-managed printing from Lightroom 2.1 to the
R2400, using Exhibition Fiber Paper with Epson's supplied PixelGenius
paper profile and Perceptual rendering intent. The photo has a
smoothly reflective section which shades from deep yellow right up to
about the 92% white and back again. This looked like a stairstep
horror as it staged from a greenish yellow to a pinkish orange, to
bare white, then back again. Ugh.
I rendered the image with the Lightroom adjustments and opened it in
Photoshop. Configured the Proof Setup for the paper target. Wow, the
difference between Perceptual and Relative Colormetric rendering on
this image is enormous. Turning on Gamut Warning, a huge range of the
image was masked. I did a tweak to the image using an HSV layer,
dropping the saturation and then another layer popping up the mid tone
brightness slightly while pulling down the toe end. This brought it
all down into range. The difference between Perceptual and Relative
Colormetric
Going back into Lightroom, I made similar adjustments in the Develop
module, flipping back and forth between the rendered Photoshop TIFF
image and the DNG adjustments until it looked better. I then rendered
that out and brought it back into Photoshop ... this one passed the
proof and gamut warning tests, even with Perceptual rendering intent.
And proof that the color managed workflow works: the finished output
print is now identical to what I see on screen. :-)
Ok, Adobe: I guess there are those occasions when one needs the soft
proofing and gamut warning. Lightroom 2.5, eh? ]'-)
Godfrey
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