This phenomenon appears to me to be cyclical, suggesting that it
may be memory getting full, and clearing out and starting again,
something like that.

We know nothing about the size of the whole image, the object
count, are you using atmosphere, I'm sure that has some random
factor, media too.

I'd be tempted to look at the code.

Steve

Julius Klatte wrote:
> 
> Strange...
> I always thought that POV-ray's rendered images were always
> exactly the same for the same code, like with 'normal'(?)
> instructions.
> 
> Example: if you calculate tan 1 with a calculator, you
> always
> get the same result: 1.55740772465490223050697480745836(...)
> 
> However, it appears this doesn't work this way for POV-ray
> image output (?).
> I've rendered the same POV code more than once on the same
> computer without using any jittering or crand or any other
> random
> function that I know of. The results were slightly
> different, as
> you can see in the attached image (that's why I posted it in
> this group)
> (close-ups of the rendered images).
> Can anybody tell me why the output is different?
> 
> Just wondering...
> 
> Julius
> 
>  [Image]

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