Marcel Tünnissen
As a polyhedron builder I prefer to build something that hasn't been
built before. As a consequence I am always trying to search in areas
where I think no one has been before. It might mean entering areas
that lead to polyhedra that are on the border of being acceptable.
When I find something that might be worth building a model, I prefer
making the model rather
small (with a diameter small than 15 cm or 6 in). This might mean that
I have to cheat sometimes. As an artist I prefer models that lack
opposite symmetries, since this usually gives a twist to the model,
which makes it more interesting.
Such models are often more challenging to build as well.
The material I use for my models is called Chromolux, which is a thick glossy paper. One reason is that the paper doesn't fade so much under the influence of sun light. Another advantage is that it doesn't look like the model is built out of paper. The disadvantage it that the glossy coating is very sensitive to glue.
The model consists of regular heptagons that are glued together, and folded over some diagonals. The model seems to consist of three capital H's. The polyhedron belongs to the symmetry group A4xI. This is one of the two polyhedra that were found for this symmetry group without any intersections (and without shared faces).
The model consists of regular heptagons that are glued together. They are folded over some diagonals. The polyhedron belongs to the symmetry group S4, which means that it lacks opposite symmetries, which gives the model a twist and makes it a bit more challenging to build. The fact that the star points almost touch is a challenge as well, since small differences in this distance show immediately.
This model, which looks a bit like a flower, only consists of regular heptagons that are glued together. The heptagons are folded over some diagonals. The model belongs to the A5xI symmetry group and hence it reflects the golden section, hence the name "Moonflower". Because of the heptagons it also includes similar ratios for the heptagon.