Rain Preparation

SketchBook Pro on the iPad. With this one, I experimented with loading black & white photos (I took with my iPhone) to separate layers (underneath the drawing and above). Set those layers to multiply and then scaled and moved them around. Then used the soft eraser as well as various brushes as erasers using the alpha color chip to remove parts of those layers. The drawing was mostly the pencil and shading with the airbrush.