McLaren Car Configurator Rendering Techniques - June 2nd, Live From Epic HQ

Question about the second clear coat normal tha maybe @Zabir.Hoque or @RyanB can answer as I’m not at my Unreal Computer at the moment…

Is the second normal available as a texture in Post processing? If its a GBuffer pass, then we could use it to render custom data to that pass? My idea is being able to use it like a ‘custom depth’ like thing for special uses. if that is the case, does the material have to be set to clear coat mode to use it or can all materials access the second normal?