This week I participated in a mapping (called building mapping too) workshop, housed by Telenoika visual artists organization ( http://www.telenoika.net ) and given by Joanie Lemercier ( http://antivj.com ).
Joanie showed us several examples, ways and techniques to do mapping projects, ranging from the most ambitious ones to household ways to do amazing things with "simple" digital tools.
Reverse mapping is one of the easiest ways to grasp the basics of mapping. It consists on projecting visuals on a 2D surface that has some sort of graphism already: a drawing, a photo, etc.
To follow the exercise proposed by Joanie, Miki has brought a poster of Fritz Lang film "Metropolis", and we both worked on this.
Joanie told us about several softwares, among whose he uses Cinema 4D, and VVVV as his workhorse. I developped this "Metropolis" project with Blender, doing two different versions. This one is the later: the work is manly on the buildings geometry, and there's only a lamp slightly rotating around the scene back and forward.
So the modelling and rendering work is done by me but the realtime mastery ;) of the visuals is from Joanie Lemercier using VVVV software. I'm looking forward to investigate if we can achieve the same reliability that we find on VVVV on a free software like Pure Data.
See my videos to find the former one, in which there's almost no modelling work, and some compositing and lighting tests instead.
More or other info at http://www.imatgedart.com/wp/el-blog/2011/12/09/taller-de-mapping-a-telenoika/