The basic unit for this wallpaper was created in Apophysis. It does not look much like a fractal, but that's OK. 3D aspect is best seen in larger sizes.
The wallpaper version can be downloaded at the preceding link.
Today's Gratitude Item: One of my students gave me chocolate :) It was our last tutoring session for the year, hence the present. Getting an unexpected gift is always fun. I know that its theoretically better to give than receive, but receiving is pretty great!