>> There are several reasons why you don't want to do that.
>>
>> http://wiki.povray.org/content/Knowledgebase:Language_Questions_and_Tips#Topic_19
>>
>
> Did you write that FAQ? You seem to promote it an awful lot. It also
> seems to assume you've already completed your scene, using "right
> x*image_width/image_height" is very useful whilst developing a scene, as
> it saves you having to adjust the camera block each time you want to
> render at a different aspect (I assume nearly everyone renders to square
> pixels).
>
>

As long as only YOU render a scene, then, it's ok.
If you create your scene and you plan to have it rendered at various 
aspect ratio, then it's also workable. You made it so that it's complete 
even if parts are not visible, and it's modeled outside the visible area.

If you create a scene using a specific aspect ratio and publish it, then 
it's not ok anymore.


Alain

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