Nekar Xenos napsal(a):
> "Warp" <war### [at] tagpovrayorg> wrote in message 
> news:4762fc3d$1@news.povray.org...
>>  I'm not sure if this depiction of Earth's gravity is correct. Earth's
>> gravity increases as you get closer to it, using the usual formula.
>> However, once you get inside Earth's surface and start going towards its
>> center, the gravity decreases until at Earth's center there's zero 
>> gravity.
>>
>>  OTOH, I must admit I don't know what is the common convention for
>> depicting a gravity well as a plane. Is the plane displaced according to
>> the strength of the gravity or according to the change in gravity with
>> respect to the surroundings?
> 
> The first one was on the same height. This one just looked better when I 
> lowered the gravity well, so call it artistic license...  ;o)
> 
> I am not sure the actual aim here is achievable: I want it to resemble the 
> POV-Ray logo (or at least a "P") be mathematically correct (of which I know 
> 0) and still look good.
> 
> Any help will be appreciated.
> 
> 
try moving the light source close to the earth so its rings' left half 
is in shadow. You might need to add another light source.

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