Christopher James Huff <chr### [at] maccom> wrote:
>>   And even if we had a "completely invisible" type of object, what would
>> be the use for this kind of object?

> Media containers. The intersection wouldn't be totally ignored, ray 
> entry/exit would still be tracked, but no texture calculations would be 
> done and trace level wouldn't be incremented.

  First it's "the intersection with an invisible object should be ignored"
and now it should not be ignored, but taken into account.
  Can you people decide whether to make the intersection calculation or not?

  And not incrementing the trace level counter does not mean that there
wouldn't be as many recursion levels as intersections.

> A similar thing would apply to transparent but non-refracting surfaces.

  You still need the intersection points. In order to get the intersection
points, you need to trace rays.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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