Christoph Hormann <chr### [at] gmxde> wrote:
> The current (3.6) behaviour was designed by Nathan - there was some 
> discussion about this some time ago (don't remember where) about how 
> exactly this background compensation should work.  If for example there 
> is a specular highlight on a completely transparent surface you might 
> want this highlight to be visible or not - the 3.6 code tried to address 
> this but you can of course question if this is 'correct'.

  Well, the highlight does make the surface less transparent regardless
of what is in the background, so I don't really see the ambiguity.

  But I understand that doing it "correctly" is not always necessarily
trivial. For example, one question is that if in an antialiased pixel
20% of the rays hit the object, 30% hit another differently-colored
object and 50% the background, what should be the color of that pixel?
The transparency is trivial (50% transparent), but what about the color?

  (I assume POV-Ray 3.6 makes the pixel 40% of the first object's shaded
color and 60% of the second's?)

-- 
                                                          - Warp

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