Bug 26125

Summary: rendering artefacts
Product: Mesa Reporter: burlen <burlen.loring>
Component: Mesa coreAssignee: mesa-dev
Status: RESOLVED NOTABUG QA Contact:
Severity: normal    
Priority: medium CC: burlen.loring
Version: 7.5   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: shows artifacts appearing on on rendered surfaces
shows hardware rendering of the same data--no artefacts

Description burlen 2010-01-19 18:09:55 UTC
Created attachment 32731 [details]
shows artifacts appearing on on rendered surfaces

When rendering a certain set of stream tubes I see artefacts on the surfaces of the tubes. Both mesa 7.5.1 and Mesa 7.7 exhibit. It doesn't happen when using hardware rendering.

see that attached images
Comment 1 burlen 2010-01-19 18:11:24 UTC
Created attachment 32732 [details]
shows hardware rendering of the same data--no artefacts
Comment 2 burlen 2010-01-19 18:14:30 UTC
notes: zooming in the artefacts recede toward the edges of the tubes, but never go away completely. the thickness of the tubes are 0.075, some but not all of the affected tubes are overlapping or very close to their neighbors.
Comment 3 burlen 2010-01-27 20:31:27 UTC
Turns out this is not a bug in Mesa, actually we're using OSMesa and the default depth buffer is only 16 bits. So we just have to explicitly set it to 32.

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