I killed the outline effect a while back. Completely removed it. It didn't work so well, it was all hard-coded in c++, it was going to be removed eventually anyway. Everyone on discord was moaning about it. I'd removed something they needed. The lack of render hooks meant they couldn't make their own. I'd fucked it all up.
I didn't want to try to make one in the Post Processing system because it would have only worked in the game window. So that's what lead to me re-writing all the shit above. Sometimes when you open a door you also open ten others.
With the new glow outline effect you can specify the regular color, and also an obscured color, and a line width. It's all coded in c# and shaders, so you have the source, so you can modify as you wish for your uses.
You don't have to use the obscure color. You can set it to transparent to get something a bit more like the old effect.
It works great for now, I didn't want to end up spending a ton of time on it. I'm hoping at some point Sam could get on it and see if he can make it a bit smoother etc.