How to make particles create a given picture in unity?

Question

Unity

Here are other people's examples:
https://vimeo.com/44490619
https://www.youtube.com/watch?v=ZEVVwpAO09I
But they are not made in unity

Answer 1

In the Shape module , you can make particles emit according to the shape of the mesh. Then you can either experiment with particle velocities, or twist the time of the particle system in the opposite direction. Then, at some point, you will need to hide the particle system and turn on the usual model. And what's on the second video is just a shader animation synchronized with particles.