Sonic Generations - PBR Shaders (WIP)

Sunset Heights has been released!
gamebanana.com...
This video was supposed to be unlisted but I forgot to change its visibility while uploading it overnight, oops.
This video showcases the PBR shaders that I've been working on for more than 2 weeks. Why? Why not?
I've been using Sonic Forces for reference and I think I got it to look pretty close. Currently, there's something extra that I need to implement with lightmaps which should make the stage look fully accurate once it's done. (mostly inconsistency with colors under shadow, the implementation should fix it). In the future, I want to implement SHLF (spherical harmonics) and IBL probes (parallax corrected cube-maps).
What will this be used for? I dunno. I want to make a proof-of-concept Sunset Heights port with these shaders. If not, it's at least a good way for me to learn how PBR pipelines work.
This video additionally contains Zoney's custom Unleashed Sonic model and GPF's skybox model & set object work.