scott wrote:
>>> Imagine how long that would take to render in POV, media, DOF, 
>>> refraction! And I don't think the result would be *that* different 
>>> (maybe the refraction would look slightly different, but a normal 
>>> person probably couldn't tell which one was correct, especially 
>>> during animation).
>>
>> It wouldn't have all those glitches that games have though. (Like 
>> grass that rotates as you run past it, or "mist" that has sharp edges 
>> where it intersects things.)
> 
> I don't think modern games have those glitches anymore, the grass is 
> true 3D geometry not just billboards, and the mist billboards usually 
> compare depths of existing pixels to avoid the hard edges with 
> geometry.  Some games even have true 3D volume textures and rendering 
> for smoke and mist, I don't know if Crysis uses this or just cheats with 
> multiple billboards.  Maybe the glitches you mention are on a game from 
> 5 years ago or on a very badly written modern one.

HalfLife 2: Episode 2 has mist in one section. Looks really 
impressive... until it intersects something.

Mind you, POV-Ray has the exact same problem, until you turn the 
settings up so high that it takes 82+ hours to render a single frame...

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