Warp <war### [at] tagpovrayorg> wrote:
>   What's wrong in using sky_sphere, which exists for this exact purpose?

Various things. For instance, if you're using an image for the sky, you cannot
brighten or dim it using finish { ambient mySkyBrightness } if you map it to a
sky sphere, because - well, there's no finish on a sky sphere.

Similarly, you cannot use different sky spheres for radiosity (you may want a
strongly blurred image for that) and reflections (you'll definitely want a
high-res image there). With standard spheres, you just define two spheres of
almost same radius, and give the inner one a "no_image no_reflection" to have
it only affect radiosity. sky_sphere doesn't allow any of these statements.

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