Why do particle emitters generate smoke shapes that are inconsistent?

Software Support & Suggestions Bug Reports
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I use a particle emitter to generate smoke, keeping the parameters unchanged. I noticed a slight difference between the two generated smoke images. However, using volume emission to generate smoke does not have this problem. This should be a bug!

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Hi there, our particle emitter in EmberGen is non-deterministic but we plan on improving this in EmberGen 2.0 which we plan to release at the end of this year!