On 13/02/2011 1:29 AM, clipka wrote:

> As a general rule-of-thumb, the #version setting only affects /changed/
> features (that would otherwise break backward compatibility), not new ones.
>

That is good to know.

> No, the Perlin-alike-noise generator used for patterns (e.g. bozo) and
> turbulence (which is always Perlin-alike) has nothing to do with it;
> SSLT doesn't need a 3D random pattern - just a stream of pseudo-random
> numbers and vectors.
>

Again, good to know.

> The difference in the noise is simply due to differences in the order in
> which pixels are rendered. In POV-Ray 3.6 that's line-by-line, and in
> POV-Ray 3.7 it's block-by-block (with the order of blocks being somewhat
> arbitrary due to the use of multiple parallel threads, making results
> differ even from render to render).

That makes sense as when comparing different rendering of the same 
scene, some blocks are identical.

Thanks for your reply/

-- 
Regards
     Stephen

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