Missing figure [normal-directions] (fig.normal-possibilities.jpg)

[hollasch]

In chapter "Surface Normals and Multiple Objects"

Originally specified in commit 3944d8d.

Also note that the !Figure directive should be indented two spaces rather than four.

[hollasch]

Consider dropping in a placeholder sketch of what you were thinking of, and then assigning over to Pete for final form with his batch of other figures to update.

[hollasch]

Resolving as duplicate of #326.