"Lutz-Peter Hooge" wrote in message .
> In article <3c59b30e$1@news.povray.org>, TAl### [at] yahoo com says...
> > function {sqrt((x*y)^2+(y*z)^2+(z*x)^2-3)}
>
> I don't know why this doesn't work,
Because the above function has imaginary values.
>but moving that -3 out of the sqrt
> makes it work, without changing the shape much.
Because this does not have imaginary values.
R. Suzuki
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