3D walker in a 3D grid / cube: what are the directions he can go to?

You must have put a lot of work in this

How did you make the list? Not by hand I guess. But with code.

How did you make the 3D graphic as a demonstration?

It’s an awesome post.

Reminds me of the discussion and your post here by the way: Iterate once and only once through all the possible configurations of an array