From LuxRender Wiki
Before the current Mercurial system was set up, the LuxRender source code repository used to be hosted on Savannah. The LuxRender repository on Savannah is no longer maintained and therefore using it is not recommended. Please use the Mercurial system instead.
Getting a Copy of the CVS Repository (no longer recommended)
Anonymous CVS Access
This project's CVS repository can be checked out through anonymous CVS with the following instruction set. The main engine module is called 'lux'.
cvs -z3 -d:pserver:firstname.lastname@example.org:/sources/ecume co lux
People using MS-Windows(R) platforms can use TortoiseCVS, an excellent CVS client which integrates into the Windows Explorer UI.