Warp <war### [at] tagpovrayorg> wrote:
> A smaller section of the parabola now.
>
>   This beautifully demonstrates *why* parabolic antennas have to be
> perfectly aligned to work properly.

....And why the mirrors in my Newtonian telescope must be perfectly aligned
to get a planet with crisp rings, rather than a yellow oval fuzzball.

What code did you use for the media?  I've tried something similar in the
past without much success.

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