Starting with the basic parameters, the CoronaPhysical Material is set as a Non-Metal by default, essentially a dielectric material where its base color can define its reflectivity and diffusion. Metalness: Metal & Non-Metal(Dielectric) and how are they controlled by base color. The Physical Material should primarily be used as the new default for any newly created materials, unless it is absolutely necessary to use the Corona Legacy Material (e.g., in case of re-rendering older scenes in Corona Renderer 7 or newer). In addition, fake and non-physically plausible material properties are not possible anymore the current material parameters are designed in a way to prevent such cases. Its diffuse calculations have been switched from Lambertian to the Oren-Nayar model, so even the simplest materials will now look better and be more physically correct. For starters, Corona Physical Material offers a natural way to set up realistic materials, making various workflows much more intuitive and simpler in the long run. There are many benefits over the old Corona Material. How is it better than the old Corona Material (now called Legacy Material)?