Where can I find LuxRender?

LuxRender can be easily downloaded from

http://www.luxrender.net/en_GB/download

There you can find versions for Mac OS, Windows ans Linux.

You have the choice to download 32 and 64-bit versions for all three OSes as well as versions that support GPU acceleration with OpenCL . Please note that OpenCL is different from OpenGL. If you don't know if you have OpenCL support then don't install that version of LuxRender. To find out if your video card has OpenCL support please consult the manufacturer's website.