Veritas, the source code on the page you linked to is a modified lrt renderer, which clearly states "For non-commercial use only." The example images do not look very impressive - I have seen much better CG hair than that. Also, there are some nice quotes in it: "3. As our scenes became more complex and of higher quality, our rendering times began to grow rapidly. "4. While it was easy to get something rendered, it was often difficult to produce renderings that looked believably like fur. Doing so required much parameter tweaking, rendering and rerendering. It became clear quickly that there is a fine line between "fur" and "rubber spiky things" that could be crossed"