Hey, I was experimenting the other day and I came across something, I found out what collid is. For an example, in my mod I have hydrogen that floats to the top of the screen, I also have fluorine which just floats in the same spot. I made the collid on hydrogen at 1.0. I compiled and put a large cloud of floating fluorine. I dropped some hydrogen below it and it sorta took some fluorine into the stream of hydrogen. I then came to the conclusion that collid is how much the particle grabs another one on the way through it.

Cheers, Jakester12345

yeah that sounds better lol
I hereby am renaming collid to Friction! lol :D