Considering the age of the Firefly engine, they would probably have to rewrite it from the ground up to get more than the OpenGL functions to work. Maybe the code stubs are already there, but if they had been, there would have been little reason to implement Superfly.

Maybe they could look at Filament and its documentation for inspiration: www.youtube.com/watch?v=gqXkPVQrfyQ gives a good example and links.

More impressive is the documentation on the engine and the math behind it: google.github.io/filament/Filament.md.html