Re: Darkened Textures

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Brian Furtaw (brian++at++sgi.com)
Tue, 10 Dec 1996 13:25:45 -0500

Do the GeoSets within the Geode have normals defined, are they facing forward?
Is the color of the geometry white, I believe the default texturing parameter
is to blend the texels with the polygon color. If you could provide a sample of
your code which demonstrates the problem to the SGI technical assistance center
as Rob suggested that would greatly advance the effort to solve your problem.

Brian

On Dec 9, 2:32pm, Rob Jenkins wrote:
> Subject: Re: Darkened Textures
> On Dec 9, 3:45pm, Aubrey Holland wrote:
> > Subject: Darkened Textures
> > Hello,
> >
> > I've been having trouble with a texture map which I have been
> > using in my application not appearing correctly. I have noticed that as
> > I increase the graphical intensity of my scene, the texture becomes a
> > darkened version of the actual RGB file(Not lightly darkened, but almost
> > completely black). Strangely, in the same run, if I highlight the geode
> > with the texture on it, it appears correctly. I'm
> > using a modified version of perfly. Also, I've noticed that if I load up
> > only the geode containing the texture and not the rest of my scene, the
> > texture appears just fine.
> > Does anyone know why this phenomenon might occur??
> >
> > Thanks,
> >
> > Aubrey Holland
> > holland++at++coaps.fsu.edu
> > =======================================================================
> > List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
> > Submissions: info-performer++at++sgi.com
> > Admin. requests: info-performer-request++at++sgi.com
> >-- End of excerpt from Aubrey Holland
>
> This sounds like something you should get a support call logged on. We'd need
> more detail of the platform you see this on, version of pf, patches installed
> etc. If you are having this problem on Impact then check you have the latest
> gfx patches installed ( 1447 for Irix 6.2, 1332 for 5.3 ). Do you have SW
> support ? If so please contact you're local office to log the call ( if you
> mail me the call reference I'll look out for it ).
>
> Cheers
> Rob
>
> --
> ________________________________________________________________
> Rob Jenkins mailto:robj++at++csd.sgi.com
> Silicon Graphics, Mtn View, California, USA
> =======================================================================
> List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
>-- End of excerpt from Rob Jenkins

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Brian Furtaw  (brian++at++sgi.com)	
VisSim  Technical  Consultant
12200-G  Plum  Orchard  Drive	Office:	(301)572-3293  Fax: (301)872-3293	
Silver Spring, Maryland 20904	OpenGL/ImageVision/OpenInventor/Performer
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