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Speed By Surface O perator 169
14.
Click the Speed By Surface operator. Set Speed
to 300 if necessary. In the Direction group,
choose Out Of Surface, and t hen drag the time
slider.
After exiting the emitter, the particles al ways
move away from the nearest surface, with the
result that they end up milling about in the
center of the cylinder.
15. Gradually increase the Speed value, up to 1,000
or so.
The p articles start to spread out vertical ly, and
eventually start moving so fast that they escape
the cylinder. You can make them stay inside
the cylinder by letti ng them accelerate more
quickly,sotheycanturnbeforemovingpast
the nea rest surfa ce.
16. Increase the Accel Limit setting until the
part icles no longer exit the cylinder.
17. Try giving the particles more room to mov e
about in by increasing the size of the emitter.
Also try changing other settings throughout
the par ticle system to see their effects. T he
possibilities don’t end here, and the more you
experiment, the more you’ll learn about how
this powerful operator works.
Interfa ce