The only way I have been able to do this is by setting the collision channels to block visible (whilst having everything else on ignore).
This won’t work for me, as it blocks input touches.
In my level, I want to use these volumes to ensure the ai can’t see through small gaps. For instance, lots of stacked boxes. I want the player safe if he is crouched behind them. But there are holes, so I want to create this volume to block the ai vision.
Like I said, I need to be able to still click through the volume to other actors.