How would I make this effect

[Jambax]

@;328235

Thanks, I have looked at that method, not really what I want, but close, I will look into HLSL, assuming that is the way to go?

Next to that, the effect will also influence any weapons carried in fps view, how do I avoid that?
is there a way I can mask out the gun? Or other meshes?

No, not if you do it as a Post Effect (which is pretty much the ONLY way to do it).

Look into CustomDepth, which is a way to render a mesh in a different depth pass and exclude it from certain Post effects, or add different post effects etc.