filter_damage_type

Hello all. So I got back into Hammer a little bit (use Hammer ++ for this). I want to create a map where the drowning damage stays away from the water, that you can stay underwater infinitely long. I first used Trigger_Hurt for this, which is satisfactory but not perfect, as the player still...

I want to make it so that my button cannot be activated by blast damage. I tried to accomplish this by using a "filter_damage_type", but the button was still activated when hit with blast damage. Button: Damage Filter: Is there any way that I can have a button that cannot be activated blast...