Everyone who teaches the Loomis method of drawing the head from an angle always shows the 3/4 angle. For example, see the middle picture below. Apparently, at this angle the eclipse on the side of the head just contacts the border of the sphere of the Loomis head construction, which is convenient. But what happens when the head turns a little farther to the right and the border of the eclipse passes the border of the sphere. Also, as the turns to the right, when does the eclipse on the left side appear, and how does it first appear? I can't find any description of this.