"Ron Parker" <ron### [at] povrayorg> wrote in message
news:slr### [at] fwicom...
>
> two "outer" control points in a row are moveable, but the two "inner"
control
> points are constrained to be the same as the adjacent outer point but with
a
> different Z coordinate (this makes a roughly semi-elliptical
cross-section.)

As I look at which group I've landed in... newusers it seems.

I understood that, almost.  I've only tried a waving flag before using
bicubic_patch and then uv mapping an image onto it, just to see if I could.
The difficulties I see with those is the multiple patches stuff, tying it
all together.  Something to try more of someday.

bob h

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