per-pixel random problems?

[Cyrille Berger]

On Thursday 11 December 2008, Matthew Woehlke wrote:
> Cyrille Berger wrote:
> > On Wednesday 10 December 2008, Matthew Woehlke wrote:
> >> I was looking at the noise filter, and noticed... it isn't very random.
> >> Specifically, there are very obvious horizontal "streak" artifacts.
> >> Anyone know why this is?
> >
> > what's a streak artifacts ? (maybe you can illustrate)
>
> noise filter in a 640x480 document? There are obvious non-grainy runs of
> pixels...
>
> I circled a few in the attached, hopefully it looks the same on your end
>
> :-). Otherwise let me know and I'll send a raw png.
Well sounds like it's a good test case for Boudewijn.. I only get a black 
image. So a raw png would be better (especially since I suspect an 
architecture issue, I suspect the random number generator doesn't work well 
on x86-64, so the next question would be wether you are in 32bits or 64bits 
mode ?)

-- 
Cyrille Berger