Thanks for that. You (I) learn something every day! By the way, I reckon Stella is one of the most impressive programs in exiistence. Thankyou.

Thanks heaps! By the way - why is the "Truncated" Icosidodecahedron NOT quite a truncated model?
I can make a model with perfect Squiares, Hexagons and decagons. Is it just that it is not actually formed by true truncation?

Can anyone step me through how to show a morphing animation of the truncation of a polyhedron. e.g. The truncation of an icosidodecahedron to from a Truncated icosidodecahedron.