Hello everyone,

I am currently learning the wonderful world of Pov-Ray and I currently 
have a few questions.

For a project I am currently working on, I'd like to create a computer 
simulation (rendering) of an optical system.  I think it could be done 
in Pov-Ray but I'm not 100% sure, hence that's why I post :)

At least, I need to create a tiny light beam (like a laser, white light 
ray, etc.).  I found this page on Google and contacted the author to get 
more information on this :

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 ?

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 ?

Thanks !

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