Re: Bit-Depth of Adjustment Layers Although you are not concerned with that, for the sake of anyone else
the layer mask bit-depth appears to be the same as that of the image
itself. (They can take up twice as much file space in the 16-bit case
for the same number of pixels).
If you are not worried about the loss of quality of the layer masks, I
think this will work. I use a related method - I do ACR raw conversion
at 8-bit, not 16-bit, for use in Photoshop, for efficiency. (I ran
tests that showed no relevant difference for my images, as long as I
get a good histogram in ACR). If I need 16-bit working later, I can
reconvert at 16-bit and remake the image in the way you suggest.
(However, I keep all the pixels). Needless to say, I would also need to
redo any pixel-changes, such as cloning & patching! It is not something
I want, or expect, to do often.
Since I create my layer masks while working in 8-bit, I am not in the
position of throwing away their quality by converting from 16-bit to
8-bit, then wanting it back.
I haven't seen any documentation on this, but my brief tests tell me
that, when I copy adjustment layers between 8-bit and 16-bit images, I
get the same values in the adjustment dialogue boxes in both images.
What else matters?
--
Barry Pearson
http://www.barry.pearson.name/photography/
Barry Pearson
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