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Let’s learn graphics seriously in this section.
1. How to obtain light sources that may radiate in from various angles
2. Integral operation of light sources and surface materials
3. All illuminated materials may become new light sources in the next frame
Due to the superposition of light in the Brynvon model, the incident energy may be 1 during ray tracing, and the final reflected energy may be greater than 1.
glossiness: smoothness
roughness: roughness
metallic: metallicity
