The basic operation is to expand a model kaleidoscopically,
according to some symmetry group. In this example a tetrahedron
is offset and rotated, and in this position is repeated to create
a model with octahedral rotational symmetry.
View this model with the command
off_trans -T 1,1,0 -R 10,0,20 tet | poly_kscope -s O | antiview -v 0.05