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Particular/Text Emitter
Hi
I’m trying to get TP to emit from a text layer. I know I have to precompose the text layer and I have done that. I can see the word (although I have had to set 20,000 particles to see it, which seems very high) but what I would really like is for ‘gravity’ to effect the word so that the particles shower down left to right. Is there a way to use a displacement map to achieve this? In other words I animate the map and particles emit accordingly.
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2 Replies
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Create another version of your text and apply an animated mask that runs across it from left to right. Use this layer as the layer emitter. Setting the layer sampling to “Particle Birth Time” will probably give you the look you want… unfortunately it will also slow rendering down extremely.
The reason you need such a high number of particles/sec is because particular samples the layer that many times per second but only emits a particle where it finds alpha values above 0. If there are lots of empty spaces where there is no alpha then Particular is sampling those and not emitting a particle, this increases render times.
If you reduce the size of your pre-comp down so that the text just fits inside of it then you should be able to use a smaller value (and the “particle birth time” method of sampling shouldn’t be quite as painful).
Darby Edelen
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Excellent, excellent advice. Thanks very much Darby.
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