> As counter-intuitive ideas go, put that near the top of the list.  How
> does it work if a reflected ray never hits?

Then it takes the color of the sky_sphere as though it were centered at the
origin of the reflected ray.

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, but it's always useful to
know exactly what's going on as this can explain some otherwise unintuitive
behaviors (such as the interaction between a sky_sphere and an orthographic
camera).

 - Slime
 [ http://www.slimeland.com/ ]

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