Registered: July 2002 Location: Trivandrum, India. Posts: 35 users gallery
Worked in two stages resulting in two finished files. Combined them to produce the copy you see now.
1. Duplicated the original layer twice. Inverted the first copy. Changed the blending mode of the second copy to Multiply. Added an adju. layer of linear gradient fill - gray to transparent. Applied a spotlight to shine from right top corner. The result was not wholly satisfactory, looked like a spooky figure popping out of darkness. Thus started a second attempt.
2. Duplicated the original layer. Added a gradient adjustment layer: Transparent to Foreground colour (gray) in Radial mode.
* Selected Gradient tool, set the gradients to Blact to White and dragged from top left corner to bottom, diagonally.
* Selected the masked area and inverted the selection. (Not sure whether use of masks is against the spirit of the challenge).
* Applied Minimum filter to the selection: Radius 2.
* Opened previously done image and activated the second image.
* Opened calculations, used the first one as source 1 and current file as source 2 and directed the output (in Multiply mode) to a new document.
The attempt was a very blind experimentation. Some of the tools used are still beyond my comprehension. Was trying things depending on the output at each stage. But certainly such tough challenges are most welcome.