I arrived late for the drawing session one time and because the room was full, artists elbow to elbow, I had to take a position off to one side - almost behind the model. In the end this was a good thing. I had an unusual angle. It was actually a simple drawing with all elements of the figure closely related in space with lots of overlapping so it was an easy drawing, easy to compare one part to another. So easy in fact I had ample time to do two complete, this ink drawing on blue was the second .
This one, pencil on grey paper done more recently, was just as easy for essentially the same reasons. All important elements march back in space like elements of a mountainous landscape - near shapes overlapping further parts. I find that starting in the foreground and working back in space, one shape after another works best. Beginning at the top risks running out of space with near shapes like large feet running off the paper. Starting with near shapes, working back, the laws of perspective are more easily seen. Look at the mattress and how it narrows as it recedes. The body does the same. Hnm, perhaps the feet here really should have been bigger!
"To be an Artist you must learn the laws of nature." Pierre-Auguste Renoir
"The last thing one discovers in composing a work is what to put first." Blaise Pascal
"What a delightful thing this perspective is!" Paolo Uccello