Source Filmmaker

Source Filmmaker

Accurate Mar 12, 2013 @ 4:08pm
Manipulating particles.
Hey, Is it possible to resize a particle effect?
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R234 Mar 12, 2013 @ 7:46pm 
You can edit just about any aspect of any particle system in the Element Viewer, if you instance it. No particle system is the same though, so unless you tell me exactly which one you want to resize I can't tell you much more...
Accurate Mar 12, 2013 @ 11:22pm 
Like a burning gibs flying particle.
R234 Mar 13, 2013 @ 12:05am 
Right. Just show the particle system in the Element Viewer (right click its animation set, click show in element viewer > particle system), then instance it (right click the system's name in green at the top, click instance particle system). This'll make a + appear next to "particlesystemdefinition", meaning you can expand it and its arrays.

The values that control the fire particles' size are in "particlesystemdefinition > initializers > radius random", and they're called "radius_max" and "radius_min". higher values means bigger fire particles, lower values means smaller. The closer these values are to each other, the more similar their sizes will be. For instace, if you set the max to 50 and the min to 1, there'll be really big fire particles and really small ones. 20 max and 20 min means they'll all be the same size.

If you dramatically reduce or increase their size, you might want to take a look at "particlesystemdefinition > operators > movement basic > gravity", to make the fire particles move upwards at the right speed. For instance, if I set the particles' size to 50, the default "Z" value in "gravity" (the number 200 after two other number, separated by spaces) isn't nearly high enough anymore, so I'd increase it to about 2000.

One more thing. Since these particles aren't meant to be very big, they'll tend to disappear the closer the camera gets to them if you make them really huge. I'm pretty sure the 10 or so last variables in"particlesystemdefinition > renderer > render_animated_sprites" control this behaviour, but I don't really have time to figure out the best combination to fix this. Best thing would be to not film the fire from too close, backing away and zooming in would do the job.
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Date Posted: Mar 12, 2013 @ 4:08pm
Posts: 3