Rahul,
   Try the following lighting:

light_source 
    {
    <-12,12,-3>
    color White
    area_light <3, 0, 0>, <0, 0, 3>, 20,20
    adaptive 3
    //jitter
    }

Note: I've got 400 lightsources, you had 9.  I also don't usually like
the jitter, I'd rather wait for the 'real thing'.  I ran this at
800x600 A0.3 on my AMD Thunderbird 750Mhz - took about 3 hrs 45 min.
Slowest lines ran about 4PPS!  There's just a little bit of banding
around coordinates 265x445, but it's pretty smooth...
I posted it at:
  http://www.untiedmusic.com/dice1.jpg

I generally find lighting is one of the places I always can criticize
about other peoples work (OK, mine too sometimes!).  Render it rough
while you're working on it, but for the finals, very dense area lights
will make a HUGE difference when trying to do these kinds of soft
shadows and edges...even the Sun is not a point source, it's a disc.
You can simulate it with area lights and get MUCH more realistic daylight.

Emory

ABX wrote:
> 
> On Tue, 10 Sep 2002 16:41:07 +0530, "Rahul Pilani" <rah### [at] yahoocom>
> wrote:
> >is something wrong
> 
> try to understand area_light parameters, they are nicely described in
> documentation
> 
> btw: this group is not for binary posting and there is a special group for
> newbie kind questions
> 
> ABX

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