Moho Animation Forum

Or other animations over their life. When I animate a fade out on the particle object (layer within the particle layer) from frames 1 to 12, the whole thing fades out after frame 12 rather than each particle.

Sounds like you need to use the particle layer to duplicate the sublayers but without animating how they are emitted. Then you can animate how the individual particle moves and fades, and use the particle layer to vary how each copy is played.
Here's a very simple example:
https://www.mediafire.com/file/hvd7z3o7 ... .moho/file

Here's another tip: You can vary the fadeout timing by making duplicate sprites and offsetting their values. For example, here's a setup using only two sprites...



Download: Stars.moho

I typically make about five sprites in my setups. The offsets help make them look more naturally randomized.