How to make toxic water?

Hello
Can u tell me how to make toxic water which do damage if player go into it?

http://halfwit-2.com/?page=tutorials&id=10 and http://developer.valvesoftware.com/wiki/Trigger_hurt

I’m pretty sure you just add a trigger_hurt brush entity placed over the water.

[editline]7:08AM[/editline] ninja’d

Oh fucking hell! as soon as I click the thread thinking “Ooh Kurtis this is your time to be helpful” wootmonster comes along…

Create a water brush and put a trigger_hurt brush in it.

^ My words exactly.

You mean like the toxic sludge in the canals? Yeah, what everyone else in this thread said.

I think it requires a little more work for the geiger counter effects though when you get near it.

^
Nope, just make radiation trigger