Among other things, Warp wrote:

>> If you want to get nitpicky, it's not a 360° image, it's a 64800° image,
>> being spherical, not cylindrical.  (At least, I *think* the number is
>> 64800, calculation could be wrong)
> 
>   No. Degrees (and radians) are used only to measure 2-dimensional angles.
> You can't measure spatial angles (I think that the mathematical term
> is "solid angle") with degrees.
> 
>   Solid angles are measured in steradians. The solid angle subtended by
> a surface is defined as the surface area of a unit sphere covered by
> the surface's projection onto the sphere.
>   The solid angle corresponding to all of space being subtended
> is 4*pi steradians.

Though astronomers and astrophotographers like to talk about "squared 
degrees"...

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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