It's a little non-obvious because of the page layout, but scroll down for the writeup (much of it is about using raymarching as the basis for rendering an inter

It's a little non-obvious because of the page layout, but scroll down for the writeup (much of it is about using raymarching as the basis for rendering an interactive application). There are also a bunch of interesting presets via the dropdown on the right. And you can shift+click in the scene to toggle cells on/off.