ir hurts ur frame rate cause it runs ur comp harder to produce and calculate how the smoke looks requires ur pc to do more work which take resources away from other functions like running the rest of ur game and will cause it to be choppy on a ok sys i use the smoke and i have no worries i cannot understand why people on less of a system than i run lower fps people need to learn to tweak

but if ur running over a 900 meg processor and over 256 megs ram with a 64 meg video card u can use the smoke with NO slowdown as long as u tweak right
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