Digital Light & Color

Yes

The huge problem with Lab is that it is very easy to create out of gamut or even physically unrealizable colors such as really bright blues. HSL is the closest equivalent in PWP and does not have this problem.

This method does not make the darkest patch pure black or the lightest patch pure white. Using the file is the recommended method.

PWP remembers the last monitor curves

The assumption is that most users will have only one set of monitor curves.

No there isn't - the method used for 8-bit per channel images can take an inordinate amount of time and memory.

Can you email me a copy of the monitorcurves file? - then I can do some tests here.

jsachs@dl-c.com

Did you mean to say you created a monitor profile or a set of montor curves?

A difference of 0.8 is pretty much invisible to the naked eye. There are a number of reasons why the preview might not match the final image precisely such as not previewing at 1:1 or working with 16-bit B&W images - the readout tool on previews is also not as precise as on a normal image. As fa...

Unless you are previewing at a zoom factor of 1:1 you may not be getting an accurate impression of the preview image due to antialiasing artifacts. Also beware of apparent changes in brightness due to different viewing angles if one window is in a corner of the screen and the other is in the middle....