I have been using Photoshop for years and would like to migrate over to Gimp but find one huge stumbling block.
With Photoshop CS
I use ctl-alt-tilde (~) to select highlights - called Load composite as selection.
Then I can use ctl-I to alternate from low to high values (lowlight to highlights) - called invert.
I use ctl-H to hide the marching ants - called toggle extra's
ctl-D to deselect and go back to whole image manipulation.
Very simple, easy to use and allows me to use any number of filters to manipulate either value. For instance, increase or decrease contrast and/or brightness within each value, or blur, or saturation, or put a very subtle canvas affect, or use a plug in that only affects that one value, the choices are almost unlimited. It gives me far more control and like I said, it is very, very easy to use.
With Gimp 2.6.7 used with Ubuntu 9.10
From what I can see I need to produce layers, and it is a many step process.
I have been looking everywhere for hours for an easy way to do this with Gimp, but so far have come up empty. A plug in? Or something even simpler?
I'm one of those types that like things simple, the many step process leaves to much room for errors.
Am I missing something, or am I stuck with layers and thus laying out big bucks (or stealing it) for Photoshop CS and Windows when I really want to use Ubuntu?
Thanks for your help.