It occurred to me that in the same way a cuboctahedron
can be conceptualised as a net of triangles expanding out from one triangle
to three which are joined to three others
and then contracting to meet at the eighth triangle -
it might be possible for 10 tetrahedrons to wrap around in 4D.
This image is a 3d print of the resulting concept.
Its a little hard to see the central tetrahedron
which is extended to form 4 more
which are connected to four larger ones
which connect to the large outer tetrahedron.
Can anyone clarify for me what 4D form this is a projection of
?