The photo of Riley shadowed involved a dark bedsheet for a backdrop, a dark towel for him to lay on, and a desklamp on the floor. Tried the camera on a tripod, but since Riley refused to sit that long, the angle was too steep so I wound up balancing it on a box pretty close to his eye level. Used the remote, .3 sec/8.0 f-stop, waved treats and pretty much kept clicking the button. Took close to 30 shots to get 3 decent pics.
I actually came up with something for this, I attempted it, but I didn't love the results. I'm going to attempt it again sometime before the weekend and post a final...