Nice shapes in the first 3 although I only visited the first two as the third was very similar.
I was interested in the fourth one as I have been working on a cube maze.
I went in and tried to walk round and thought I would try going down a hole which I did and landed on the stud board which I guess is the base.
This was a surprise as I expected the fractal process to generate patterns vertically an well as horizontally.
Might just be me.