Is this just a closed-source ripo^H^H^H^H fork of Three.js?

The example shown on famo.us is identical to MrDoob's Three.js example that uses CSS3:

http://www.mrdoob.com/lab/javascript/threejs/css3d/periodict...

Edit: looks like it's the other way around -- according to MrDoob's G+ post from last year, he based his Three.js CSS3 example directly on the design created by famo.us: https://plus.google.com/113862800338869870683/posts/QcFk5HrW...