Instead of just posting the final painting, I thought I'd share my steps.
1: Here is the source photo. I took this when I visited Kathmandu in 2007.
2: I comp in a 3D character, and add the bare bones of some background buildings.
3: I run the Art History brush over the whole thing, using different sizes and different brush shapes to break things up and add visual interest.
4: The final painting. Elements have been simplified and transformed to fit the story I have in mind.
Thanks for looking!