I liked kiska's side-by-side with the Layers Palette, so I'm using the same method!
To create the grid selection...
* Duplicate Background
* Apply Richard Rosenman's Grid plugin (available free here:
www.RichardRosenman.com Click Software > Photoshop. This plugin should work for
PSP and Elements, too). The plugin rendered a grid of white lines on black background. Perfect!
* Clicked the Channels Palette tab.
* Ctrl click on any of the channels (they're all the same) to "load the selection"
* Back to the layers palette... turn OFF the grid layer
* Press Q to enter Quick Mask mode
* If you've got red grid lines, fine, otherwise Ctrl + I to invert the selection.
* Filter > Other > Minimum to increase the grid line width
* Q to exit Quick Mask
* Layer > New Adjustment Layer > Hue/Saturation. Notice. The B/W grid on the mask? Mess with the sliders.
* Alt + Click on the Hue/Saturation Adjustment Layer mask. The selection is again loaded.
* One more time: Layer > New Adjustment Layer > Hue/Saturation.
* Ctrl + I (to invert the mask)
* Mess with the sliders again to affect the part of the image not affected by the 1st adjustment layer.
* >>Discovery<< I didn't know you could apply Layer Style effects to an adjustment layer...
but you can! (Drop shadow, Outer glow and Bevel in this case.)
Holy cow! Does the fun never end?
~Danny~