Strange artifacts on cheap card: my fault??
Hi,
My openGL scene gets rendered in a different way on my notebook. There are strange artifacts appearing sometimes in the border of the scene :
http://www.geocities.com/liebeskleineskerlchen/artifacts.jpg
It seems that some triangles are culled by the graphic card (I render QUADS, so it can''t be my fault, right?)
I can''t remember the name of the graphic chip, but I read that it''s one of the worst you could by 2 years ago
Is there a workaround to avoid these artifacts?
Thanks
what are the artifacts?
http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html
http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html
I don''t know if artifact is the right term, but it seems that parts of some rendered quads are simply culled (but they shouldn''t). Here a screen shot of the scene with my notebook:
http://www.geocities.com/liebeskleineskerlchen/bad.jpg
Some triangles in the upper right corner are simply culled away! If I turn backface culling off on that computer, or if I rotate the camera slightly, the scene is rendered correctly.
Here a screenshot of the scene how it should be rendered (and how it is rendered on a different computer):
http://www.geocities.com/liebeskleineskerlchen/good.jpg
The graphic chip on my notebook is a ''SiS 630/730''...
http://www.geocities.com/liebeskleineskerlchen/bad.jpg
Some triangles in the upper right corner are simply culled away! If I turn backface culling off on that computer, or if I rotate the camera slightly, the scene is rendered correctly.
Here a screenshot of the scene how it should be rendered (and how it is rendered on a different computer):
http://www.geocities.com/liebeskleineskerlchen/good.jpg
The graphic chip on my notebook is a ''SiS 630/730''...
Perhaps your normals are flipped? Or the quads'' vertices are specified in reverse (clockwise vs. counter-clockwise) order?
MatrixCubed
http://MatrixCubed.cjb.net
MatrixCubed
http://MatrixCubed.cjb.net
that looks to be a ''major'' error in the graphics cards drivers email the chips makers with a sample application.
http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html
http://uk.geocities.com/sloppyturds/kea/kea.html
http://uk.geocities.com/sloppyturds/gotterdammerung.html
Thank you all for your help. I really think something is wrong either with the driver either with the chip.
I''m just guessing from the first screenshot but have you tried changing your far clipping plane?
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