Here's another example of artificial sunlight demonstrated during the San Diego, Nikonian's lighting workshop. In an outside patio near the hotel pool, we had our model Amira stand near a wall where I was able to project interesting shadows on.
Here's a photo of the set up for this shot. I placed a Nikon SB-800 fitted with a full cut CTO gel in the pool area for this shot. The fence around the pool provided a nice pattern on the wall as well as the flooring.