RE: displacement artifacts

["kim aldis" <kim(at)cg-soup.com>]

I wouldn't think so, there's only a small amount of height there - re-ranged to 0-0.08 from a full range image.

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Michaël Bentitou
Sent: 15-March-2006 17:01
To: XSI(at)Softimage.COM
Subject: RE: displacement artifacts

Yeah it was just a shot in the dark, I know you know better than that Kim ;-) It can?t be something like not enough information in your Trans/disp image like 8Bit/16bit issue, can it ?

 

-=mb.

 

 

 

-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of kim aldis
Sent: Wednesday, March 15, 2006 11:28 AM
To: XSI(at)Softimage.COM
Subject: RE: displacement artifacts

 

no, I tend not to do that. ;), but the level of detail is quite fine.

 

 

 

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Michaël Bentitou
Sent: 15-March-2006 15:30
To: XSI(at)Softimage.COM
Subject: RE: displacement artifacts

Could your objects be insanely small or large in terms of Softimage units ?

 

-=mb.

 

-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of kim aldis
Sent: Wednesday, March 15, 2006 10:01 AM
To: xsi(at)Softimage.COM
Subject: displacement artifacts

 

I'm using displacement maps in a way that requires a degree of accuracy. I'm making small, slightly raised lumps using a matte image to drive transparency. For the displacement I'm using a slightly shrunk and softened - few pixels - version of the transparency map. This gives me a nice rounded edge to the raised, circular lumps. As you might guess, though, I'm getting some artifacts. Unusual ones, though. Slight pixelation around some of the rounded edges and little black marks on the inner areas; where you wouldn't expect them. upping the length doesn't help but increasing the subdee on the mesh - stupidly increasing - does. I'd rather not do this because it's hitting the render times.

 

has anyone seen this; any thoughts?

 

cheers.

 

 

 

kim(at)aldis.org.uk