hmmm, i've actually started making a map like this b4 i read this post. i have a basic volcano terrain map, but i didn't start the actual "magma" part yet. hope the pic helps.

you could place a team=0 actor with a "lava gun" gun beneath a hitmos=0 team=2 actor above it to make the lava emitter never stop.

Explanation: Team=0 actor shoots at team=2 actor and hitmos=0 makes the bullets go through it and spray all over the terrain.

You bumped a three month old thread, and you were wrong.

A regular emitter can fire forever just the same, and won't be shot at by the other AI.