In article <3e600b54@news.povray.org>,


> http://www.mbork.de/bsp/bsp_2.htm
> 
> He said that this was rendered in Pov3.0, and it cannot be done the same 
> way with newer Pov.  Anyone got an idea to make a such light ray ?

It is not impossible to do the same way, it's just that there's a better 
way. Instead of multiple light sources or cylinders of glowing media, 
pov can simulate the paths photons actually travel through the scene. 
Look in the documentation for the photon mapping feature, and the 
optics.pov demo scene.


> Also, I'd like to get my renderings a little bit "dirtier" : is it 
> possible to add a subtle grainy effect (like the grain of a film in the 
> photography world) to the entiere rendering ?

The best way is to do things like use normals and grainy patterns, and 
otherwise try to get dirty textures. There are ways to add a flat noise 
to the image, but it does not make the scene itself look more real, it 
is more of a film effect.

-- 
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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