Hi Chewielewis,
Very interesting sources, as always, thank you!
Im not 100% convinced that anything was “re-rendered” a lot of these changed shots could be simple alterations of the original source (Fode and Beed was definitely patched with after effects or similar, not a re-render).
Some scenes were obviously re-rendered: http://www.framecompare.com/image-compare/screenshotcomparison/1B01NNNU
(and the beginning crawl was also re-rendered).