There are several ways I'd say.  Kind of depends on what kind of Sun.  A
simple ambient disc or just colored spot on the inside of a sphere or
sky_sphere.  A sphere itself with media properties or just textured surface.
Lots of ways.
The spot on inside of a sky sphere would be done using a wood pattern color
map then rotated into place with perhaps a gradient y pattern layered over or
under that (filter used in the upper layer).
A media Sun would be best for outer space scenes probably.
What is the intended use?

Bob

"Zilvah" <zil### [at] onlineno> wrote in message news:395defd3@news.povray.org...
| Anyone knows how to make a sun in POV-Ray?

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