On Wed, 2 Jan 2002 13:33:31 -0600, "Jon Berndt" <jsb### [at] hal-pcorg>
wrote:

>OK, thanks. That makes sense. What does the UV stand for?

Local / parametric / material / surface coordinates. XYZ are the
coordinates of a point in 3D, but if restricted on a defined surface,
a point can be defined by just longitude and latitude, i.e. U and V.
Knowing the UV coordinates and the surface, the XYZ coordinates can be
found, and vice versa.

Of course you can have a third local coordinate, W, but it makes no
sense for surfaces, only for volumes.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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