[Radiance-general] Deterministic calculations with Radiance

[Gregory J. Ward]

I didn't really explain this right.  The problem is not just different 
implementations -- but what I said earlier about thresholded values 
causing the random number sequence to get off track.  There's no easy 
fix for this, and trying to reproduce exact pixel values will always be 
a problem with any Monte Carlo renderer.  If you don't believe me, try 
it yourself.

-G

> From: Randolph Fritz <randolph at panix.com>
> Date: February 2, 2005 9:16:58 AM PST
>
> On Wed, Feb 02, 2005 at 06:21:18AM -0800, Gregory J. Ward wrote:
>>
>> The ideal approach would be to use a pseudo-random number generator
>> that is repeatable.  In principle, Radiance does this, but due to
>> differences between machines and implementations, in practice it does
>> not work out that way.
>>
>
> Why not incorporate some random number generators with Radiance,
> instead of relying on whatever the system happens to provide?
>
> Randolph