Maybe make a hole and just throw the particle on it?

That's how valve did the finale for P2

You might just have to put a hole in the wall or something.

I attempted it with RT cameras, but they didn't seem to work.

This is just a place to place ideas that others can make or to brainstorm ideas.
I have always had trouble with ideas, and I know other have as well.

Be sure to credit whoever came up with the idea!