It would be nice if the article under discussion had anything to do with the technology that goes into the Rift, but, as I detail elsewhere in this thread and in an as-yet-unmoderated comment on boyd's blog, it appears to be based on research done in 2000 and not updated to account for differences in 3D rendering between then and now, e.g. the modern ubiquity of normal mapping, whose absence is called out as a problem in the 2000 paper on which the article is based. The article nowhere states that any of its content has basis in research carried out with modern rendering/VR technology, but the implication is so skilfully done that I'm finding it very difficult to avoid the conclusion that the article is deliberately deceptive for the sake of firing up controversy.