Bug 12109

Summary:	Radeon render artifacts with RS480
Product:	Mesa	Reporter:	Javier Kohen <jkohen>
Component:	Drivers/DRI/r300	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED WORKSFORME	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	Approaching the floor, no artifacts A notch closer to the ground. Some artifacts appear. Even closer to the ground. Artifacts begin to clog the view.

Description Javier Kohen 2007-08-23 03:44:02 UTC

I'm using the xorg-video-ati 6.6.193 driver along with Debian's Mesa
7.0.1. I have a Radeon xpress200M.

I've noticed that render artifacts show up whenever the camera gets too
close to ground level both on Google Earth and Neverwinter Nights. On
the latter, enabling sky boxes can also cause similar artifacts when the
camera is far away from the ground (i.e. close to the sky).

Basically these artifacts appear in the form stray textured polygons
that appear between the camera and the object of interest, thus making
it very hard to see anything at all. These polygons also appear when the
camera is in other positions, only that it seems les common (probably
due to most objects actually being at ground level).

I'm attaching some screenshots that show how the view on Google Earth deteriorates as you get closer to the floor. The artifacts on NWN are similar.

Comment 1 Javier Kohen 2007-08-23 03:45:01 UTC

Created attachment 11221 [details]
Approaching the floor, no artifacts

Comment 2 Javier Kohen 2007-08-23 03:45:33 UTC

Created attachment 11222 [details]
A notch closer to the ground. Some artifacts appear.

Comment 3 Javier Kohen 2007-08-23 03:46:18 UTC

Created attachment 11223 [details]
Even closer to the ground. Artifacts begin to clog the view.

That's it for the screenshots. Getting even a little bit closer already covers the whole viewport with artifacts.

Comment 4 Dave Airlie 2007-08-23 13:56:48 UTC

can you try with the Mesa git tree? the code in 7.0.1 doesn't have the clipping fixes in it yet.

Comment 5 Javier Kohen 2007-08-24 01:20:24 UTC

Yes, that was enough to get rid of the issue. Thanks.

Comment 6 Adam Jackson 2009-08-24 12:27:52 UTC

Mass version move, cvs -> git

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.