On 10/18/26 19:35, Leroy wrote:
>          right Size
>          up Size

The right and up settings are vectors so 'Size' for both is getting 
promoted to <Size,Size,Size>.

My guess is that POV-Ray internally sees the identical promoted vectors 
as an invalid right/up vector combination and you end up with some 
parser de-mangled right/up vectors. I see no warnings that this is 
happening though, for which I'll give the parser ten demerits.

I think the de-mangling of the <Size,Size,Size> vectors might also be 
creating a sqrt(2) multiplier of the resulting, internal, right and up 
vectors. Or maybe this multiplier comes about otherwise - I don't know.

If I'm guessing well, using:

right <Size*sqrt(2),0,0>
up    <0,Size*sqrt(2),0>

would be valid right and up vectors where the orthographic camera scale 
will match what you are seeing currently for a confusing result - except 
now, with the red sphere showing up on the left as you expect.

Bill P.

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