This interpretation is based on the photo posted
here. It was my first shot at using this technique and I was OK, but not thrilled, with the result.
For preparation I used a Curves adjustment layer to neutralize the shadows around his face. This washed out everywhere else, so I inverted the adjustment layer (CTRL + I, turning thumbnail black) and airbrushed with white in the shadow areas.
For color boost I applied a large dose of Saturation.
A new layer was created and all visible layers merged into it (Alt + Merge visible.) It was from this layer the pattern was created.
I started with the Wow 7 Watercolor - Large tool preset and stayed with it throughout. Soon into the effort I set fade to 25% in the brush dynamics setting. I thought that added some realism to the strokes.
These are approximate settings I used depending on what I was doing at the moment:
* Brush size 100-250 pxl, Opacity 15%-20%: Large, broad strokes
* Brush size 30 -75 pxl, Opacity 25%-40%: Medium strokes
* Brush size 5 = 25 pxl, Opacity 35%-25%: Detail strokes
I created several layers... and set a couple to blend mode = multiply to get some strokes to look more overlapped. When I finished, everything looked mostly OK except the facial detail looked like it was drawn by a four-year-old, so I cheated a bit by duplicating the modified background, dragging this layer to the top of the layer stack, added a Hide All layer mask, and with foreground color set to white, I airbrushed in a little detail here and there.
Topped everything off with layer filled with 50% gray, blend=Overlay, opacity=25% to which Art Paper 101 texture (available from
www.Trimoon.com) was applied.
~Danny~
p.s. After uploading the image, I thought the texture might have been a bit much. The 2nd version is without the texture layer.