there are several tutorials at this site that do similar effects (although i don’t think any of them do it with particular):
https://www.ayatoweb.com/ae_tips_e.html
it would be fairly easy to do this in particular though, you’l just work in reverse (blow particles out of the logo, then time reverse the effect)
first you would create a comp with just the pics. each pic would be just one frame and they would need to be sequenced out. also, don’t make this comp too large, particular doesn’t work as well with large particles… i’d go with sd frame sizes or smaller.
then you bring the particle comp into a new standard sized comp along with the logo, add a solid and add particular. set the logo layer to be 3d, then in the particular settings, set the emitter type to layer then set the layer to the your logo layer and set the direction to directional.
the particles will now be flying out of the logo shape. you can adjust the particles/sec, velocity and directional spread to start seeing how it will work. ultimately you’ll need to keyframe the particles/sec so they emit as a burst, so when you reverse it, it will look like they all come together to form the logo.
to set the particle to be your pics, goto the particle settings and chose particle type ‘custom’ then choose your particle comp in the custom settings. you can play around with the time sampling, but i think you’ll want random still.
once that’s done your pics should be flying out of the logo, you can set the particle settings as needed, they are pretty self explanatory. then you’ll take that comp into a new comp and choose layer>time>time reverse to get the pics to come together to form the logo. you’ll also need to do a quick transition form the pic-formed-logo to the actual logo, but that’s the basics.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW