Re: flickering with zbump

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

What's with those damn black artifacts?  Can anyone at Soft give a clear explanation of the problem and maybe put as at ease and tell us it will be fixed in the next release.  It happens way too often and there doesn't seem to be a clear repro for it.  I know I've submitted some nasty scene files to illustrate it.  The problem is that its somewhat random but seems to happen often when using OpenEXR, HDRI or shaders like zbump or dark tree.  I had it pop up again on a job where I was using an OpenEXR image as an environment for reflections.  I got lots of the little buggers so I converted it to HDRI and it worked fine.  It just happens a bit too often I think.  If its an MR thing, we need to bash their heads in a bit to address the problem.

Kris

kim aldis wrote:

Didn't the new version fix that?

  

-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
Behalf Of adrian
Sent: 09 August 2006 12:20
To: XSI(at)Softimage.COM
Subject: Re: flickering with zbump

we had issues with this, but it manifested itself as 2x2 or 4x4 pixel
black squares.....

resolved by lowering the bump factor, or some convoluted rendertree
chicanery to stop zbump returning NAN values

not much help i know

a

Adrian Wyer
Fluid Pictures
33 Glasshouse Street
London
W1B 5DG
----- Original Message -----
From: "Chris Marshall" <chris(at)eclipsecreative.co.uk>
To: <XSI(at)Softimage.COM>
Sent: Wednesday, August 09, 2006 12:22 PM
Subject: flickering with zbump


    

Hi All,
Does anyone get flickering problems when using zbump?
I've seen it on two jobs now, and it's so bad we've had to go back to
regular bumpmapping, which isn't ideal.
It happens when you have an object breaking through the surface of
      

the one
    

using zbump. The flickering occurs around the area where the one
      

object
    

penetrates the other.
Anyone seen this or can offer some advice on fixing it?

Thanks

Chris


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