Warp <war### [at] tagpovrayorg> wrote:
> POV-Ray will interpret "1 2" as two numbers, but "1 -2" as a subtraction,
> resulting in one number. Thus the comma is not *strictly* necessary when
> the next number has no binary operator in front of it, but it's
> nevertheless a good idea.
>

This is disproven by my example above.

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