Below I added the Youtube link in case it works better.
A good friend of mine, Brent Watkinson, http://brentwatkinson.com/landscape/gallery1.php has a wonderful lecture about silhouettes, and our collective recognition of things by their shape, as well as the ambiguity of what we may be seeing because of ambiguous shapes. A silhouette of a rubber ducky can look like a door knob if seen from the front, but turn it sideways and, presto, a rubber ducky! We can’t just turn things sideways to make them obvious all the time, but we can definitely find fun, cool, dynamic silhouettes to help tell our story. Sometimes it may even be a good idea to make a silhouette vague in order to make the viewer participate in the image more. They will fill in the blanks as it were. The main point is to understand shapes and volumes and how they work in your image. You are the director.
To continue a thought on sculpting reference, I have added some of the hands I had made in Zbrush to use in a current project. I started with one basic hand, and using the masking, and transform tools, I moved fingers, wrists and thumbs to make the various gestures I needed. This leads to more sculpting to fix the strange crimps and bulges that will occur when messing with the polygons in this way, but it's fun to figure out what is going on in, and on, a hand when it is asked to make certain motions. Again this was very handy... when wanting to see the possibilities in the round, as well as lighting. In this case the reference to sculpt my reference was readily available :)
I thought I would share some of my process of late. I have been using Zbrush to model some of my reference. While this is fun, and I have been learning about anatomy all over again, I find that I , of course, have to get reference to sculpt my reference, probably doubling my time instead of halving it. But, I like doing it, it keeps me interested, as I am learning anatomy all over again. One big benefit of having my reference in 3d is that I can change the lighting, camera angle, even textures if I need to, all with out making the model hate me. Don't get me wrong, I think taking your own reference photos is invaluable, also part of the art process, and something I will continue to do. But for a change of pace, and to learn something new, I have found that sculpting some of my models in 3d has been an eye opener, and a fun experience. Change can be good, who knew?!?!
The above images are of the 3d references and the illustrations they helped make. All Except for the old couple, that is a new project that I hope to be able to share with you soon.
Software used for the 3d reference
I had posted this earlier but I wanted to be clear on giving credit where credit is due. This painting is based off of Norman Rockwell's "The Dugout" painting. His is such a masterpiece of light and body language, plus fit so well with the narrative elements of the book I was illustrating, I could not resist the homage. Mr. Rockwell's name is in the signature but I wanted to mention it here again. Thank you Mr. Rockwell.