[Radiance-general] ambient bounces

[Thomas Bleicher]

Jia.

If the number of bounces is exceeded without hitting a source or
infinity the value specified with "-av" (ambient value) is used. The
default value is "0 0 0" so you won't get any artificial contribution.

You can use rvu to read the average value of a scene on the screen.
This gives you a first approximation of -av.

Regards,
Thomas

On Tue, Apr 20, 2010 at 6:11 AM, Jia Hu <hujia06 at gmail.com> wrote:
> 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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