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Hi,
Does anyone out there know about how to create light rays in POV-Ray.
In the help
document under Atmospheric Effects, it says that it can be done, but
gives no specific
examples.
So far, I have run a few tests with fog and adding a filter number to
the rgb of the fog
colour, add some light, and there is still no difference between the fog
that remains in
shadow and the fog that lies in light.
Any help with this matter would be appreciated. Thank you.
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Chad Kruger wrote:
>
> Hi,
>
> Does anyone out there know about how to create light rays in POV-Ray.
> In the help
> document under Atmospheric Effects, it says that it can be done, but
> gives no specific
> examples.
>
> So far, I have run a few tests with fog and adding a filter number to
> the rgb of the fog
> colour, add some light, and there is still no difference between the fog
> that remains in
> shadow and the fog that lies in light.
>
> Any help with this matter would be appreciated. Thank you.
In the example scenes that came with the program you will find 3-4
scenes that use scattering media and spotlights to illustrate how
to make visible light beams (I forget the names off hand). You
might also check out the tutorials at the links below for more
on using POV-Ray's media function.
http://members.xoom.com/POVRAY3/media1.html
http://members.xoom.com/POVRAY3/media2.html
http://perso.infonie.fr/rod.gelaude/
--
Ken Tyler - 1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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%POVpath%\scenes\interior\media\media1.pov is one example of such a thing.
Bob
"Ken" <tyl### [at] pacbell net> wrote in message
news:38A2558E.67C44B21@pacbell.net...
|
| Chad Kruger wrote:
| > Does anyone out there know about how to create light rays in POV-Ray.
| In the example scenes that came with the program you will find 3-4
| scenes that use scattering media and spotlights to illustrate how
| to make visible light beams (I forget the names off hand).
Post a reply to this message
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Chad Kruger wrote:
> So far, I have run a few tests with fog and adding a filter number to
> the rgb of the fog colour, add some light, and there is still no
> difference between the fog that remains in shadow and the fog that
> lies in light.
>
hi chad,
visible light rays can only be made with atmospheric media using
scattering media. there is no possibility to make them visible in fog.
adjusting your media is much more complicated than fog. for the
scattering color use very dark grey (max 0.2 when i remember right).
also make shure that your traced rays don't need to walk an infinite way
through the media: put your media into an object instead of into the
whole world.
this will avoid povray to stop the calculation before all media is
traced (which means a very unreal black pixel instead of the media's
color).
p.s.: have anybody thought about using this scattering errors for
modelling snow?
i know it's resolution-sensitive but at some resolutions it
looks like real snow!
alex
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