For context on the shading: I use the same method of shading for all the complex 3D shapes. This helps the student to know how to identify the top/right/left of the graphic with a little more ease than going based only on the shapes and angles. Also, if I remember correctly, I ran this theory by our 4 (blind) proofreaders a year or two ago and they liked the method.
So to clarify your response, I need to go in and change all of the orthographic maps/nets to 3D shapes for the whole book? Even though the rules specifically say that it is "not possible" to do these graphics clearly in 3D and that we absolutely must use orthographic nets?