SFM is just a runtime "mod". You dont have any control over the level. Like others said its garrys mod with a timeline. You wouldnt animate something like a character in an engine because the tools arent going to be as robust as an animation package. The animation tools it includes are just for tweaking animations, which…
At this point wouldn't it also be fair to compare with CryEngine 3? Someone already was working on cinematics using CryEngine 2, and with Crytek announcing movie focused version of CryEngine 3 a while ago I think it should be up for consideration. Especially considering like the SFM, it's yet to be released. Here was an…