In article <3eabd9e2@news.povray.org>,
 sascha <sas### [at] userssourceforgenet> wrote:

> A cylindrical height-field is not supported,

Not as an internal primitive, but there is a macro in shapes.inc that 
can generate cylinderical height fields.

It would probably be simplest to use an image as a bump map. The object 
pattern could be used to limit it to the area in the interior surface of 
the ring. Alternatively, if an engraved look isn't required, you could 
simply use a different looking texture for the lettering, the object 
pattern along would work...just use the a text object with the object 
pattern and a cylinderical warp to get it lined up with the inside of 
the ring. If a non-reflective texture the same color of the metal is 
used for the lettering, it might have an etched look.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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