k. Well, what i did was:

create cone
create 3d fluid container
shift select both
emit from object.
create larger cone around it. shift select both
make collide.

But there aint no collision. i need them to radiate out evenly in a cone shape. and then when they hit objects to be blocked and continue to radiate outwards in manner of a spot light. (the whole point of this is to, in effect, solidify a spot light. I'm really sorry to bug you so much. I've been trying for days! :blush: