Important ChangesIntroduced LuminousIntensity (expressed in candela) and Illumination (expressed in lux) classes.Replaced Spot/Point lights specular and diffuse intensities with a single LuminousIntensity value.Replaced Directional lights specular and diffuse intensities with a single Illumination value.The specular, diffuse, sheen, clearcoat, and scattering models are now fully replaceable.The default lighting model is now glTF's.