Bill Hails wrote:

> H Frank, thanks for your comments.
> 

> 
>> Hi Bill!
>> 
>> Looks good, but the lighting needs improvement: your sun is an
>> extended light source, so
>>  - no shadows of the bars carrying the planets should be visible
>>    on the desk
> 
> I agree, but an area light introduces too vague a shadow on the
> rings of saturn. I'd pinned my hopes on a parallel light, but that
> requires a pont_at statement :-(
> I was trying to avoid letting the planets look too much "in the room"
> as opposed to "in space", the harsh shadows on Saturn's rings
> help there, I think.
> 
>>  - the disk below the sun (on the desk) should be free of shadows
>>  - the shadow of the book in the foreground should be very soft
>>  - more than a half sphere of the planets should be lit (esp. Venus)
> 
> same point vs area light issue, maybe a fairly tight area light would do
> it.
> 

I was just paging through the manual and found 6.5.8 "Light Groups"
It looks to be exactly what I need - separate lighting for the planets.

I'm constantly amazed at the maturity of POV-Ray, it's like every
problem I have has already been solved somewhere!

>[...]
>>    Sputnik
> 

-- 
Bill Hails

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