Combinatorics: Simple Case
Trihedral vertices, no concave or crack edges, uniform illumination (no shadows)
- 4 ways to label a line, so
- 42 = 16 labelings for an L
- 43 = 64 labelings for fork, arrow, and T
BUT out of 208 junctions, only 18 are physically possible
Still, savings don’t look that big...