restriction: when 1, only bots can spawn here; when 2, only humans can spawn here (be careful with these, or the game will crash because someone cannot spawn)
*/
-/*QUAKED func_pointparticles (.5 .5 .5) ? START_ON IMPULSE
+/*QUAKED func_pointparticles (.5 .5 .5) ? START_ON IMPULSE VISCULLING
A brush that emits particles.
-------- KEYS --------
mdl: particle effect name from effectinfo.txt
-------- SPAWNFLAGS --------
START_ON: when targeted, the particle emitter will start switched on
IMPULSE: only send the full amount of impulse particles when the entity is triggered
+VISCULLING: only emit particles if the emitter brush is in the current PVS
-------- NOTES --------
Use trigger_monoflop if you want the particles to turn off for a while, then turn back on.
A BGM script is a .bgs file named like the map, in the maps directory. Its format is lines of the form