In order to get to learn more about Octane render.otoy.com/index.php shaders and it´s lighting system I bought a RC model of an Audi, spraypainted it white and projected an animation I did in Cinema 4D onto it.
Some objects deliver an attractive surface for throwing light with a beamer on it. Some others show an intensive inside space, like the harddisk. the projections are proposed to be frontal from one top direction - so its always about the top surfaces to be projected on. In some cases its possible to work with free forms, which do not break the 90° angle of the top surface like the hemisphere obejct, or the sound-damping peaks...
also check the main project 01 Zentrale: vimeo.com/16554053
The project 01 Zentrale was planned to be ready to install at platine festival 2010 in cologne. http://www.platine-cologne.de/10/?p=71 It was the first time experimenting with Video Projection Mapping on real Objects. It is a pity to film all the stuff, because the real light mapping experience is so much more impressive in live.