Mario Veraart (rioj7++at++fel.tno.nl)
Tue, 7 Oct 1997 22:41:55 +0200 (MET DST)
I have a small difference in the look of my databse in perfly_ogl
and perfly_igl on a Onyx RE2, with Performer eoe 2.0.1.
At the system 'uname -a'=IRIX64 vtd 6.2 03131016 IP19
When I view my 3D world there is a small problem with one of
the textures. It is a road texture that contains a transition part
from road to grass. (It's one of the multigen defaults,
country_road.rgb: SGI imagelib image (1024 x 32)
For pergly_ogl:
When the attributes of the texture where mipmap=BILINEAR then I see
some aliasing effects when the road comes close, when I fly over the
terrain. With mipmap=MIPMAP_TRILINEAR I see some strange bands apear
at the lower mipmap levels. The road looks half grass and half grey.
For perfly_igl I don't have the effect at MIPMAP_TRILINEAR.
It looks like the calculation of mipmap levels for OpenGL are not done
correctly.
Is there a patch for this problem?
There are no patches installed that have an effect on the OpenGL libs.
Mario
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