Lecture 13: Global Illumination & Path Tracing (20)
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BRDFs are generated either theoretically from analytical models or captured in physical models. It seems that BRDFs are captured using physical models because the analytical models used are usually very complex. Here's a link to a discussion detailing more about it.
BRDFs are generated either theoretically from analytical models or captured in physical models. It seems that BRDFs are captured using physical models because the analytical models used are usually very complex. Here's a link to a discussion detailing more about it.