Slime <fak### [at] emailaddress> wrote:
> What Warp was saying was merely a distinction about how the ray-sky_sphere
> intersection is actually calculated. For practical purposes, it's sufficient
> to imagine it as a sphere with infinite radius

  It is actually quite important to know that the sky_sphere behaves like
a unit sphere around the origin of the ray.
  Why? Because when you apply a pigment to it, it works like a unit sphere.

  If you start thinking "hey, sky sphere is infinitely large, how can I
apply a gradient pigment to it? I can't scale it infinitely large!" you
get into problems.

-- 
#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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