In article <3f8aaa18@news.povray.org>,
 "Hughes, B." <omn### [at] charternet> wrote:

> I now know what you are saying about the self-shadowing though. I usually
> take it to be that a dark side is a "self" shadow. What you meant is that a
> torus, for example, with no_shadow applied does not cast a shadow across
> itself from one edge to the other. I don't always get these characteristics
> right but I do remember that being a classic example before.

What you are thinking of is double-illumination, or rather the lack of 
it. You could consider it a kind of shadowing, but the light isn't being 
blocked from reaching the surface, it's just on the other side of it.


> This whole thing is really about whether or not shadowing caused by light
> sources, other than the one containing it in a looks_like statement, would
> exist. It doesn't seem correct to remove the shadow which could be produced
> by all other light sources just because it's a looks_like object. For
> instance, a light bulb casts a shadow from sunlight. This has been discussed
> a lot before, I know.

I agree.

-- 
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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