When I cobbled together ‘fine structure‘, I also tried my hand on a 3D version. For over a year, I completely forgot where I put the code, until this evening. Most of the code is rough but two pieces are presentable. Click the images to go to the constructs.

When in lo-res, move the mouse up or down to adjust the threshold level of the noise curves. Clicking the applet switches between dynamic lo-res mode and static hi-res mode.