> Hi,
>
> In order to have a better impression of speed and a faster overlook of the final
> image, the last pass should render the pixel in a certain order.
>
> During the first passes, Pov calculate a render weight of each pixels. The
> render weights is determined by the cpu/memory/time needed to render. And on the
> last pass, Pov render the pixels by weight order.
>
> It's also a way to find rendering holes, where most of the time is consumed.
>
> Did you think is a good idea ?
>
> Cheers
>
> Nico7550
>
>
>
>

Interesting idea... But not doable without a huge render time cost.

"First pass" can only occurs during a render using radiosity. It's known 
as pretrace steps and is used to collect radiosity data before the 
rendering itself. It crutial to prevent artefacts.

Next, a "quick" pass before the render itself can't raly help in finding 
the pixels that will need the more computation as that quick pass just 
can't touch every pixels and follow all trace paths when there is any 
reflection or refraction, and, if there is any media, compute that 
media, and you need to know that in order to sort the pixels render time 
weight.



Alain

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