This was done as a test for some procedural effects in Modo. It was cool to do, because I gained more experience in lighting and rendering in Modo, as well as surfacing and shading.
The one thing I stuggled with is the volumetrics. I want to go back to it some day, but for now I have enough to do.
Compositing work done in Nuke.
The Ubuntu logo was just a random choice. I like the look and I required a round logo.