Question:-):
You didn't say if that's photons or caustics, and if photons I suppose none
were used for reflection of the sphere and floor both.  Maybe that could
explain a difference about the ceiling.  And although it is radiosity used
there I'd guess you also had to use a light_source too, or not?
--
text{ttf"timrom""bob h"0,0pigment{rgb 7}translate 7*z}

"JRG" <jrg### [at] hotmailcom> wrote in message
news:3c25076e@news.povray.org...
> This is the POV version (very approximated) of a Lightflow demo image.
> Rendering time was 2h 55m (AA method 2, max_trace_level 15).
> I could post the original for comparison (the glass is a bit too dark
here).
>
> --
> Jonathan.
>
> Home: http://digilander.iol.it/jrgpov
>
>
>
>

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