Clearly, this article is mostly useless if you're interested in writing your own voxel engine. The final result is far from perfect. I just want to share the petty drama of my past four and a half years. I for one thoroughly enjoy reading about other people's struggles. Maybe that's weird.
Full story: http://et1337.com/2015/02/18/the-poor-mans-voxel-engine/
Game engine: https://github.com/et1337/Lemma