In article <3a1aa74d$1@news.povray.org>, "DreyWerx" 
<you### [at] hotmailcom> wrote:

> i was thinking about making a real projection.  is there a way of 
> giving a ray of like composition? like for example, in a smoky room, 
> it you turn on a projector, and place a design on it, you will se the 
> projector's ray breaking up into parts.  is there a way of doing this 
> pov-ray? or should i just place a semi-transparant plane with a 
> design on it in front of te light-source?  but this seems to be 
> taking too long in computing all the photons

Shining the light through something is currently the only way to color 
the light. However, you only need photons for this if your light is 
being reflected or refracted in this scene.
About the photon calculation, it sounds like you just put a plane object 
in front of the light. MegaPOV will fire photons at the whole object, 
since planes are infinite, you will get a lot of photons fired at 
portions of the object that won't effect the results, and a lot fired 
into space. Try a 0-thickness box instead, or triangles or a polygon.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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