"Apache" <apa### [at] yahoocom> wrote in message
news:3e063464$1@news.povray.org...
> I think we're going into the right direction here! I came up with a
> lensflare idea like this about a year ago. Never thought about it after
> that, because I'm too lazy/busy. Need to sleep sometimes... :-)
>

I put together a real camera lens about a year ago during beta testing and
had some successful results with lens flares, however I can no longer get it
to work with the final release.  (web link
http://news.povray.org/povray.binaries.images/19888/)
I used fresnel reflection with a visible light source as opposed to using
specular or phong highlighting.  The key to realistic lens flares, is
realistic lens series, as the geometry and properties of the lens are what
causes the particular details of the flares.  Unless you are or know an
expert on lenses, then this informatin is difficult to find, but I did
eventually find one example, but I can't remember the link (there is some
interesting info here though, I'm not sure how useful
http://www.jmlopt.com/index2.aspx), ah here it is
(http://www.cs.princeton.edu/courses/archive/fall98/cs426/assignments/ray/ca
mera.pdf).  If anyone is interested, I can try put the scene back together
and post it.

-tgq

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