Sorry for the late reply, Linda. But, that is a good question.
When I did the plein aire studies for the landscape, I already had in mind the pose for the model, and had my sketchbook on hand with a thumbnail drawing of the figure (done from pure imagination, though I knew which model I was going to use). With the self-timer, I hopped up on the rock and assumed the same pose as the figure (yes, fully clothed
) in order to get the cast shadow shapes on the rock. I later added the shadow into the study.
But, due to budget constraints, my studio lighing setup was Rube Goldberg-ish, at best. Plus, the model could only work at night, so there wasn't even an inkling of natural light in the drawing sessions. Thus, my inherent struggle with this thing. Again, hindsight-wise, this approach will not be repeated with regard to the figure. If ever I'm compelled to do this sort of thing again, I will find a way to employ natural light on the figure.