FSX/P3D. One of the things I pointed out in my volume 1 of my tour of NCA review was the fact that the shadows on the photoreal coverage in the Yosemite Valley were too dark and detracted the detail of the parks most important landmarks. Well now there is a freeware project that is now in development that makes these areas so much more real, it's incredible. The granite on El Capitan and Half Dome has never, ever, looked crisper or more detailed in FS. There is a non embedable video available which you can watch via the source link below. Looks really great! Can't wait to soar above this!