yes - of course it is a cheat, but so are most rendering effects from vertex lighting to cubic environment mapping (can't wait for real-time hardware ray tracing ;) )
I think the end effect is the most important thing and in the demo it honestly looks like some volumetric lighting casting through the scene - now you know how it works, its like looking behind the scenes at a movie set.
I think the end effect is the most important thing and in the demo it honestly looks like some volumetric lighting casting through the scene - now you know how it works, its like looking behind the scenes at a movie set.