
the picture is of an isomer space (C3H7NO), with compact mode on and atoms rendered as circles. The code is here, for now:
http://gist.github.com/70342
which is a kind of dumb way to achieve this, as it creates an instance of a renderer for each molecule, instead of adding them to a molecule set, and then laying that out...
edit: just realised; it's rendering the hydrogens as compact black circles :(
edit2: Ahhh. that's better:

edit3: Ha! This was a mistake, but it looks kind of cool:

