Would something like this work: http://www.renderosity.com/viewed.ez?galleryid=453843 I can dig up my settings if this is close to what you want. (Although this is a little bit of postwork painting to refine it.)

RosemaryR
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"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."