Why is incoming radiance zero for most directions? I'm assuming that it's because we have only one light source but would this work for real-world scenarios where light reflecting off other surfaces contribute to incoming radiance?
jonathanlu31
I think this is partially answered in the later lectures on global illumination where it says that the importance sampling for direct lighting and brdf sampling for indirect lighting is done separately.
Why is incoming radiance zero for most directions? I'm assuming that it's because we have only one light source but would this work for real-world scenarios where light reflecting off other surfaces contribute to incoming radiance?
I think this is partially answered in the later lectures on global illumination where it says that the importance sampling for direct lighting and brdf sampling for indirect lighting is done separately.