Hello counters, I read an article from Allegorithmic about PBR and real world lightning, but I am a bit confused and still don't understand. Are there good sources about how real world lightning works and interpolated into PBR?Especially I am interested in what the differ between all metal and non-metal materials, also…
This is a nice source on the coloring of metals, but it's unrelated to the PBR model: http://www.webexhibits.org/causesofcolor/9.html Also: The book by the people that invented modern PBR (the one used in movies and 3D software), can be read for free now: http://www.pbr-book.org/3ed-2018/contents.html (edit: the part…
There's also a Guide to PBR by allegorithmic available as an e-book. That one also for a good job of putting the info into usable context for an artist.
Another good resource is the documentation on any of the offline renderers. They have been physically-based or 'PBR' for decades - albeit pre-disney BRDF and GGX microfacet reflections(with most now having moved to the metal/rough approach) The concepts of energy conservation, light bleed/bounce, and…