I am currently researching on how to achieve this effect. Apparently it can only be achieved by using env_laser. I'll find out more about how to apply this effect in a trigger_hurt area.
Edit; Turns out it's very tacky thing to achieve. You can use the env_entity_dissolver, but to achieve the effect, it has to be placed on a ragdoll, after the player have died. Applying the env_entity_dissolver to a live player will simply kill the player without displaying the effect happening.
I'm trying to re-work this thing around and try to see if I could achieve this solution.
Try doubling the current max value for the damage type in trigger_hurt; they might've snuck that in there.
I tried that, it only do generic damage.
So we can set players on fire, but can we give them the vaporization effect from a trigger_hurt? Like they were killed by the Pomson, Cow Mangler, etc
Just curious, how can you set them on fire without the pyros?