"Sebastian H." <van### [at] gmxde> wrote in message 
news:42ef4cb6@news.povray.org...
> Bob Hughes wrote:
>> The desktop reflection, or rather highlighting, of the light object might 
>> be
>> the most dramatic change of all. Seems to be a slight change in the 
>> shadow
>> at the base, too, although I don't notice any difference in the sphere's
>> shadow.
>>
>>
> Interesting.
> I let gimp calculate the difference image
> (pixel that differ are bright).
> As you said the shadow isn't affected (as expected).

Looks like the light spread, or diffusion, on the desktop nearest the source 
is quite different-- if I read this image right (darker least changed, 
lighter most changed). Maybe that's why I thought the shadow there might be 
different. I like how this shows zones of no change between the rest of it, 
showing as rings of blackness.

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