I do have this enabled in my project sadly. It’s still not working properly. I am using eye tracking software in VR to line trace, but I don’t believe this should matter much considering it’s only producing one trace. I mean, it DOES get the coordinates info from the debug message from my last image ( http://imgur.com/LQ0cDub ) but like I said before. It’s not painting the texture anywhere else but one spot. I’ve even tried many different UV unwrapped models. still the exact same 
the little donut is the line trace location.
The opacity mask doesnt have any other info except directly to opacity.
but even when I disconnect the opacity. Right when the line trace is pointed at the mesh, instant red color.
also I am using 4.14.3