Re: Black dots in renders

[Kris Rivel <kris(at)krisrivel.com>]

I had this when using some combination of FG, HDRI and reflection.  I 
was able to repro it in a small scene and send it to support where they 
confirmed it.  I think its some kind of bug with MR where its trying to 
sample a value below 0.

Kris

James Prevette wrote:
> Had this happen when anything piped into an ambient occlusion node is 
> greater than 1.  In my case it was a weight map with a factor of 1.2.
>
> Stephen Aplin wrote:
> > Jim Altieri wrote:
> > > Wayne,
> > >
> > >  
> > >
> > > Had a similar problem here and I believe after removing one of my 
> > > ambient occlusion maps it went away.  Not sure if your using AO but 
> > > worth mentioning.
> > >
> > >  
> > >
> > >  
> > >
> > > Jim Altieri
> > >
> > > Rejectbarn Design & Animation
> > >
> > > http://www.rejectbarn.com
> > >
> > >  
> > >
> > > ------------------------------------------------------------------------ 
> > >
> > >
> > > *From:* owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] *On 
> > > Behalf Of *Wayne
> > > *Sent:* Monday, May 01, 2006 10:58 AM
> > > *To:* XSI(at)Softimage.COM
> > > *Subject:* Black dots in renders
> > >
> > >  
> > >
> > > Searched a bit on the base and found a couple posts but no one 
> > > really came to a conclusion as to what actually causes the black 1-4 
> > > pixel sized artifacts to occur. Using a dual, dual core amd box here 
> > > and got a ton of them (4-6 per frame) in my last render. Using an 
> > > ldr image with one area light casting shadows in the image. Some 
> > > posts at the base suggested scene size but I have a single character 
> > > about the same size as the default man that ships with XSI so Im 
> > > guessing it isnt that. Has anyone else had this occur and if so, any 
> > > workarounds you may have come up with apart from hand painting them 
> > > out frame by frame. Thanks!
> > >
> > > -Wayne-
> > Had the same thing on a single character, and upped the subdivision 
> > step for the effected frames (the difference between the model I was 
> > using at a level2 and a level3 subdivision was pretty much 
> > unnoticable), and re-rendered those again. This has usually worked, 
> > but not always. I was using the dirtmap plugin at the time, but was 
> > getting the black dots in my colour pass. Weird.
> >
> > Steve

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