Documentation about Loop subdivision and displacement was missing from the wiki so I put something together. This post will be used to host the example blend file that was used to create the example found in the wiki. If you have a suitable example please create a post in this thread for that example file and link to it from the wiki.
I'd like to add some links to details about the implementation. I assume the subdivision part is based on Charles Loop's thesis from 1987. Is this correct?
But what paper is the displacement part based on?
edit: added a new example blend file with regard to changes in the displacement direction in LuxRender v1.2