Warp wrote:
> Chambers <ben### [at] pacificwebguycom> wrote:
>> You're dealing with two numbers, one of them being approximately 20 
>> million times the other.  It's a known aspect of the hardware we use 
>> that you should keep your ratios smaller than this to avoid precision 
>> errors.
> 
>   Where exactly are you getting that number?

Location of 1M, radius of 0.05.  Since floating point uses, well, a 
floating exponent, you're fine mixing numbers of the same scale, but 
objects of extremely different scales won't necessarily have the same 
precision when used together.

I assumed that it was this mixing of scales that caused the error 
(similar to what's explained here: 
http://tag.povray.org/povQandT/misconceptions.html, look under "Sunlight 
Simulation"), as I didn't know about POV's internal limit on 
intersection distances.

...Chambers

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