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Hi,
I did a very simple (although somehow brain damaged) thing:
A simple scene, haveing a box. which has the following pigment:
pigment {
wood
frequency 5
colour_map {
[0, red 1 green 1 blue 1 transmit 1.0]
[0.5, red 0 green 0 blue 0 transmit 1.0]
}
}
This resulted in an invisible box (no surprise) and a light blue
spot at the ground - which was a surprise.
Anybody knows why this looks like it looks?
Thanks
Alexander
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In article <web.3d88e285cb77a6ae7dc403f50@news.povray.org>,
"ascscr" <asc### [at] gmx de> wrote:
> This resulted in an invisible box (no surprise) and a light blue
> spot at the ground - which was a surprise.
>
> Anybody knows why this looks like it looks?
You had the box sitting on a ground plane? Did you make sure the bottom
of the box wasn't coincident with the plane? I'm betting you had a nice
blue sky background?
This is my guess as to what happened:
The camera ray went through the side of the box, and the first thing it
hit on the circle area was the bottom of the box. When POV continued
from that point, the plane intersection was rejected because it was too
close to the beginning of the ray (it does this so transparency and
reflection work right), so it went on to your sky. Outside the circle,
the opaque ground was hit first (precision error) and the ray just
stopped there.
--
Christopher James Huff <cja### [at] earthlink net>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tag povray org
http://tag.povray.org/
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