Doorway shot with Nikon D40 and 18-55mm kit lens
The technique for making this is as follows:
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Photograph shot in colour
Foreground colour in colour picker set to the same colour as the stonework
Go to Filter>sketch>graphic pen, and use the sliders to produce the sketch image you like
Go to Edit>fade graphic pen>blend mode set to multiply>opacity slider reduced from 100% to suit
Attribution: a nice video by Rick Salmon here and follow the list of tutorials until you get to ‘sketchin’.
Photograph Works 