No, they look about 3x3. This was explained by Daniel Rind the last
time this was mentioned:-
Dan wrote:-
snip
Nope, they are something like sqrt(-2) or 10/0.
And it's in the nature of the floating point specification, that
whatever you do mathematically with a NAN or INF value, it will
prevail. INF - 10 is still INF, and 12 * NAN is still a NAN.
So when mental ray applies it's filter kernel (which is by default a
3x3 Gauss in XSI now), then every pixel touching your NAN value will
also be a NAN, which results in a black splotch that scales with your
filter size.
Swarfega elegantly throws away the samples that are not a number or
infinity, but ultimately you should try to find out which shader is
causing them, and report / replace / fix it.
Ciao, Daniel!
snip
Kim Aldis wrote:
Is it single pixel black dots Chris?
-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
Behalf Of Chris Marshall
Sent: 01 March 2007 15:58
To: XSI(at)Softimage.COM
Subject: Re: mmmm rounded corners
When I get a chance, I'll dig the scene out.
Daniel Rind wrote:
The lens shader is a band-aid to get rid of the symptoms, but the
problem (a
buggy shader) remains.
Ciao, Daniel!
2007/3/1, Chris Marshall <chris(at)eclipsecreative.co.uk>:
I thought you'd already identified this problem, which was why you
wrote
the swarfega lens shader?
Halfdan Ingvarsson wrote:
Do you have any example scenes that you can send me, which I can
then
forward to mental images, so that they could pinpoint the error and
fix it?
Thanks,
- ½
_
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