So I tried to duplicate this, only I have no footage of ppl so I used some other clips, just to try it out. I couldn't get it to work, all the Custom Particles has black squares surrounding em, why are the crowd in his tutorial masked ( or whatever it's called) out.
It's driving me mad since he doesn't talk about it in the tutorial. He sets up his crowd clip, render it as a .mov file and imports it into a new comp and the crowd blends in with the other crowd particles just fine. Mine doesn't, like the fireballs I imported they didn't blend with eachother like that. They all turn in to little squares, like a bunch of little video clips.
I masked out a jpeg pic to see if I could get that working but no, still get squared particle objects.
I'm honestly going nuts over this so please help out a newbie if you can!
Mmh, sounds like you are not properly creating the Alpha channel. Any masking should be done either in a sub-composition or already properly contained in the clip as an Alpha channel. In your case you should simply move your JPG with the mask into another comp and then use this com as the custom particle.