"B. Gimeno" <nos### [at] jazzfree com> wrote in news:3ef7d9d5@news.povray.org:
>>
>> The source code for one of the images below contains a light
>> source (and renders in less than a second), while the source
>> code for the other image does not have a light source (and
>> renders in about 3 seconds).
>
>> So here is a little quiz: Can anyone guess how this was done ?
>
> Once you've got the first image, just reuse it as image_map (in a box?) )
> with ambient 1
Nope, that's not the way I did it. No image maps were used.
>> And which of the images has source code with light_source ?
>>
>
> I can't see any difference between them
As Chaps said; There is a tiny difference.
(It is easier to see it if you invert Chaps' difference image.)
Tor Olav
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