In this article, directly from the Crytek Principal R&D Graphics Engineer, Tiago Sousa, you can get more information on exactly how we went about re-creating Crysis 2 in DX11.
Quote:
With Crysis 2 being our first multi-platform game, our main focus was to ensure a successful delivery on all supported platforms. Unfortunately, such constraint didn’t allow us to concentrate on DirectX 11 with the level of commitment that is to be expected from a Crytek release.
This is the reason why it was decided to give the R&D team sufficient time and effort after the release of Crysis 2. The “DX11 Ultra Upgrade” is the result of this work: it is a free visual upgrade add-on introducing DirectX 11 support, as well as a wealth of graphical improvements and performance optimizations for both DX11 and DX9 API’s.
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http://www.mycrysis.com/news/crysis_...e-for-crysis-2
Making of the DX11 Ultra Upgrade for Crysis 2
28th June 2011, 08:27
Making of the DX11 Ultra Upgrade for Crysis 2 
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