"And" <49341109@ntnu.edu.tw> wrote:
> Another concept diagram, the principle of this little program. Each pixel on the
> output image generates a "primary path" to calculate the scattering sun light
> with many segments. then return the sum of them. the variable
> 'sky_light_primary_path_res' in the .pov is control the resolution of it.
>
> If the 'calc_secondary_scatter' turn on, it will sampling secondary paths on
> every segment of the primary path. then add the effect "sunlight --> skylight
> --> skylight". It will much slower when you turn it on. But for a dense/thick
> atmosphere it will make some difference.

This is the demo. The left is only the primary scattering, it takes 34s to
render. the right is calculate the primary + secondary scattering, it takes
18m33s to render.

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