I would like to see Cycles' principled shader implemented in Superfly and have a similar shader in Firefly, with a similar result in render. The actual "Physical Surface Root" lacks diffuse reflections in Firefly, that way the results are bad.

@knyghtmare - I don't think that getting rid of the passes is really possible. Firefly is a REYES-style renderer, like Pixars Renderman. Even Renderman uses seperate passes for things like indirect light and SSS. It's just how this kind of renderer works, I guess.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.