Am Samstag, 12. Juli 2003 12:29 schrieb Doug Rabson:
> On Wed, 2003-07-09 at 16:10, Michel Dänzer wrote:
> > On Wed, 2003-07-09 at 14:11, Martin Spott wrote:
> > > Rupert Levene <[EMAIL PROTECTED]> wrote:
> > > > On Thu, Jul 03, 2003 at 01:07:28AM +0200, Michel Dnzer wrote:
> > > >> PS: http://levene.dyndns.org/invisible-text/normal.png does show a
> > > >> driver problem - the lighting is wrong with HW TCL - but you didn't
> > > >> report that... ;)
> > > >
> > > > Well I'd assumed that _this_ was a software problem since it's a new
> > > > in the latest version =) Is this a known driver problem?
> >
> > Yes. HW TCL seems to be severely broken in general in the Radeon
> > drivers, which can be worked around by setting the R200_NO_TCL (or
> > RADEON_TCL_FORCE_DISABLE) environment variable.
> >
> > > If the scene looks to be too dark, then you can assume it's a driver
> > > problem.
> >
> > Why don't you just take a look at the screenshot? The red tiles aren't
> > supposed to be red. This particular problem seems to be caused (or at
> > least amplified) by many light sources.
>
> I see this kind of thing with my own 3D software (see
> http://qdn.qubesoft.com) running on the r200 dri driver. I have a
> feeling that its something to do with modifying light parameters. In my
> 3D scenes, we render large numbers of objects, potentially each with
> different lighting configurations, depending on which light objects are
> in range of a given object. We call glLightX to modify the parameters of
> the GL lights many times in a single frame. This appears to be the main
> problem with the r200 rendering errors. FWIW, my software works very
> nicely with nvidia hardware/drivers.
You are free to test with the ATI binary drivers, too.
Can you please try it?
BTW Q looks very cool.
Are there any plans for Unix versions of Q2Demo?
Regards,
Dieter
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