statto nous illumina en ce 2008-12-10 07:22 -->
> Is there a way to use a fog-like command to kill all rays over a certain length?
> 
> Rather than the exponential decay with length with a normal fog, I would like
> any ray over a certain length to be entirely eradicated, and any ray shorter
> than that to be transmitted, possibly with a slight fuzziness between these two
> extremes.
> 
> Any ideas?
> 
> 
There is no ready, automated, way to do that. I'm not sure why you want that.

What you can do:
Enclose your scene within a large sphere centered at the camera. That sphere's 
radius is set to the distance at whitch you want your rays terminated. Be sure 
to make it hollow, or use the "inverse" key word, if you want to use some fog.

Use one of the background feature, and make sure that there are no object 
farther than the maximum distance you want. You may put your scene into an 
union, and intersect it with a large sphere. Anything outside that sphere will 
be removed.


SarkD, bounding box don't work that way. Bounding boxes are used to make ray 
intersection tests with objects more efficient. You test against the list of 
bounding boxes, and, if you hit one, you test the object within.

-- 
Alain
-------------------------------------------------
A modest man is usually admired; if people ever hear of him.

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