[Radiance-general] ambient bounces

[Jia Hu]

Hello all:

If ab (ambient bounces) =3, after a ray reaches three times of diffuse
bounces and does not hit any lighting source, then how should Radiance
define the value of this ray, for example, radiance or irradiance, in order
to calculate the radiance at the viewpoint using backward ray tracing?   I
read chapters about calculation methods in the book, Rendering with
radiance, but still a little confused.

Thank you in advance.
Jia
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