First, a summary of Part I and Part II:
1. Loomis divided the standing male human figure into 8 horizontal divisions, each representing 1 head height; and a bisecting, vertical line (the standing female figure has slightly different proportions. See below for the pages showing the male and female proportions.) The width of the diagram is 2 1/3 heads wide. NOTE the vanishing point (on an invisible horizon line) that's highlighted in yellow.
3. By applying the standing diagram's anatomical divisions to the perspective diagram, the figure is correctly drawn in perspective.
4. This diagram is an alternative method of making a perspective diagram of the Flat Diagram. It's more of a freehand version of the first method while using the same anatomical divisions.
That's the summary of those sections of this page.
The final diagrams on this page involve applying the perspective drawing to a figure that's bending.
1. In this diagram, Loomis applies the Flat Diagram to the upright portion of the body. For the bending portion of the body—the portion that's in perspective—he uses the perspective diagrams that he explained on the rest of the page.
2. This diagram shows two bends of the body. By applying the Flat Diagram to the upright portions and the perspective diagram to the foreshortened parts, your figure will be accurately drawn. (I added the lines from the diagram to the vanishing point.)
I think the 3 keys to understanding this page are: 1) accurately create a male or female Flat Diagram with all of the proper anatomical divisions; 2) determine your horizon line and vanishing point and 3) project your vertical lines to your vanishing point. Once those 3 steps are down correctly, you just have to divide your diagram correctly using midlines, diagonals and intersecting lines.
Here are Loomis's proportions for the standing female and male figures. Note the differences:
That completes this series. I hope I explained this clearly. If you have any questions, additions or need more clarification, PLEASE post a comment below. And become a follower of this blog, too!
I'll continue to dissect this book and other Loomis books since they're all full of great drawing instruction.