You might wonder what tree canopies and beautiful women have in common. True, they share an organic nature, composed of many broad and subtle curves, but their simplest geometrical outlines reveal other similarities.
Look at how, in each instance, we are able to break the tree into flat, sawed-off diagonals. Notice the very few (if any) incidents of 90 degree angles, and how the diagonals oppose each other strongly.
Compare that to a similar treatment of the images below. Again, notice the deficit of 90 degree angles and the abundance of opposing diagonals.
Once an angular 'girl canopy' is established, it is easier to introduce subtle curves to the outline / interior while maintaining the very structural -- and very natural -- shape of the figure.
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