I've made numerous test folds yet the triangle twist fold has continued to tease me but after moving closer and closer, the twisty bits finally touch each other.
Like all the triangle twist fold networks, the back side is all woven hexagons. One odd thing though is, even after all these tests the triangle twist fold hasn't gotten easier.
Some have torn apart, some burst corners. After hours of creasing, tugging, gathering, pulling, flattening, taping etc, some have resisted collapsing for days (like the one in the lower left). I was slowly learning how many layers were where, and how to isolate different colored adjacent rosettes, and where to place buttons to stabilize the folds. Still some of the models have refused to collapse. I was beginning to feel a little obsessed, but I thought Foldilocks wouldn't give up.
If it seems creased, it's because I had to unfold it to get a picture of it finished. There are not quite a hundred buttons, (including the ones on the other side that mostly stabilize the edges) most of them are on the back. Once the buttonholes and buttons were in place the folding became a matter of buttoning and straightening. It still took over an hour, but it went smoother than most of the paper models.
These two pictures show the buttons from the top (front) side. They demonstrate an alternative placement that buttons a topside button through two buttonholes. This keeps the flap joining two rotated triangles from lifting so easily. I only did one for a test, but I like the effect.
