At E3 2005, Killzone 2 was debuted with a trailer depicting soldiers landing in a hostile war-zone on Helghan and fighting Helghast forces. Critics in the media argued that the trailer shown at the E3 2005 trade show did not show actual gameplay footage, as its high level of visual detail has been argued to be impossible to render in real-time on the PlayStation 3 and the audio mix of the trailer was slightly delayed. SCEA's Vice President, Jack Tretton, was quoted as saying that the Killzone footage, that was believed to be pre-rendered,"is possibly real" and "is real prerendered gameplay", but it was later claimed that Tretton was referring to Resistance: Fall of Man. Several days after the demo, Phil Harrison, SCEA Europe's VP of development, stated in an interview that all of the PS3 game footages at E3 2005 was "running off video" which was "done to PS3 spec" using "in-game assets" and "some things were rendered". the CG studio Blur stated in 2006 that they had turned down the offer to create the Killzone 2 clip, and that "a company in Scotland had worked on it"



well today Killzone 2 can be displayed in high definition 720p(may be it will be upscaled), locked at 30 frames per second.....the Killzone 2 uses a deferred rendering engine that integrates MSAA Quincunx ( which is multisample anti-aliasing even if this technique is not perfect :it has some issues like :
1-Aliasing and other artifacts are still visible inside rendered polygons.
2-Multi-pass rendering techniques may suffer when interacting with edges.
3-Since stencil values are still per-pixel according to the specification, some strange interactions can occur at the edges of polygons when using techniques such as shadow volumes.)
The Cell Processor will also parallel process geometry and indirect lighting....

i think the game looks really good and even near to the GC vision of 2005...