Before we go any further, we will have to install LuxRender to set up the materials of the robot model. This is necessary because LuxRender works more independently than YafaRay. If we choose to use LuxRender materials, all of them must be set up in the exporter. To use LuxRender, visit http://www.luxrender.net and download the most recent version of the renderer, which is version 0.6.
Downloads are available for Windows, Linux and Mac OS X. With the download of the LuxRender package, the Blender 3D exporter is already packed together with the installer. If you have trouble installing the exporter, the Python script called LuxBlender is available as a separate download. Download the file and copy it to the Blender 3D scripts folder. If you are using Blender 3D 2.49, it is necessary to install Python 2.6.x (http://www.python.org) to use LuxBlender without any errors.
During the installation process of LuxRender, the installer will ask for the location of the Blender 3D...