Another day another diagram

Weather was miserable today so worked from home.

Starting from a sketch drawn by FK, I decided after a couple of attempts to create a 3D model in Mathematica to use as a reference graphic.

I drew the knot diagram in Inkscape first, and then used it as a texture for a surface in the Mathematica model — that way I wouldn’t have to fiddle about with perspective warps and could just trace directly over the transformed image in Inkscape.

After a first draft a few modifications had to be made. Will finish tomorrow.