Green's rules

Green's rules are a procedure for generating $n$-$n$-3 acrohedra. The rules are based off of Mason Green's construction of a 7-7-3 acrohedron, the small supersemicupola.

Green's Rules has produced valid $n$-$n$-3 acrohedra for $n$ = 4, 5, 6, 7, 8, 10, 5/2, 7/2, 8/3, and 10/3. All are orbiform.

Procedure
The procedure can be described as follows:


 * 1) Start with a virtual $n$-gon.
 * 2) Attach an $n$-gon to each edge.
 * 3) Connect the second open edge of each new $n$-gon to the second open edge of $n$-gon attached to the virtual $n$-gon two edges away.
 * 4) Add triangles to the triangular holes.
 * 5) If the remaining open edges can be closed with a regular polygon or regular polygon compound close it, otherwise add $n$ $n$-gons and return to step 3.

Example
The following is an example of Green's rules applied where $n$ = 10. The result is the gyrated blend of truncated dodecahedra.