Decals aren’t visible through the particle emitter, which is good, but for some reason literally just character faces are visible through it. (The particle emitter is for a smoke grenade)
What we are going to do is just make the smoke parts if we cannot come up with a solution, but we like how the emitter looks.
When I tested this in studio, my character’s face wasn’t visible through the smoke emitted by a smoke emitter.
A small demo place + maybe some system specs might help.
Have a screenshot?
It’s always been like that since the beginning. I forget why but there’s some reason for it, I think it has to do with making something work correctly in first person camera but I can’t remember exactly what.
I’m pretty sure I actually welded a fake head onto a character and made the main one invisible at one point to work around it. Try that. It’s very specific behavior for exactly the Head->FaceDeal IIRC.
It’s because of the way the rendering works. It doesn’t work for a lot of people since their heads have a transparency of 0. Since you have the Headless head, the decal renders oddly and it causes it to appear on top of it. This happens with transparent decals as well.
I am not saying I know exactly how it works, this is my guess.
No, it’s for our game, has nothing to do with having a headless head
Alright thanks, we’ll try that. 
Mk, sorry, that was just my guess. I’m honestly not surprised I was wrong.
It’s no problem bro