There is a thread on Gaf where they create bullshots. Pretty easy actually. Take the PC version, put everything on Ultra, render it at 4K or more (it doesn't matter if you get only 1 or 2 fps) and then simply downscale the screenshots in an image editor applying some nice resizing filters. Add some flares and image editing magic here and there and you got your bullshot.
Of course, WD wasn't only that. All the nice clothing physics were gone too. It's a great game, but they should start to be honest about it. Uncharted 3 was full of bullshots too, even if the final game looked great. God of War 3 was one of the honest ones, since the initial trailers where actually worse than the final game. Right now, I simply ignore screenshots and wait for let's play videos.
About KZ2, despite the renders, the final game actually looks better with superior animations and lightning, even with worse textures than the render.
