In the left half of the painting, the rising violet diagonal to the top center of the painting intersects the descending red diagonal at a point 2/3 of the way up the painting, defining the height of the brown land at left, and 1/3 of the way across the painting, defining the back of the figure near the idol.
In the middle of the painting, violet lines of 60-degree slope descend from the top of the main figure’s axis. The left line passes along his forearm, arriving at a prominent crease in the sleeve of the large child by the cats. The right line passes along the main figure’s other forearm, along the back of the central seated nude, and along the arm and leg of the first woman in the right-hand group.
A violet line ascending from the base of the blue vertical defines the elbow, wrist, and face, respectively, of the three right-hand women. Voila…