dissolve.py: Keep track of particles for duration #3353
Merged
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Because the particle system starts affecting particles in frame 10, a lifetime of 80 means that some of the earliest particles will begin to die off at frame 90, well before the 128-frame animation is complete. It appears that, when particles die, they "reset" to their starting point.
This change raises the lifetime to 120, to ensure that the particle system keeps control of all particles for the entire duration of the animation.
Fixes #3350