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Weird artifacts in ParaFoam

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Old   January 12, 2011, 07:16
Default Weird artifacts in ParaFoam
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John Wang
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Hi guys,

I've recently been seeing these weird artifacts when post-processing using ParaFoam when viewing slices:



I have not seen anything like this before in OF1.6, and haven't noticed this in OF1.7 until now (since I haven't been using the slice function before this). Any idea on how to fix this problem? Thanks.
My system is OpenSUSE 11.3 with ATI graphic card, if that helps.

John
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Old   January 13, 2011, 01:47
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John Wang
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Well, after some investigation it appears that the ATI driver is at fault. The flow field rendered correctly when using mesa driver through SSH.

John
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Old   January 13, 2011, 19:00
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Bruno Santos
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Hi John,

Well, you got lucky that you only got artifacts. Some people aren't so lucky and get complete crashes of their machines, because the OpenGL driver (from the closed source ATI/NVidia/Intel drivers) put its finger in the wrong bits of memory, or GPU instructions, in the graphics card.

You can try downgrading your ATI drivers to a previous version or upgrading to the most recent version. The other possibility is that you have enabled the nifty and sweet hardware acceleration for desktop display; you may loose eye candy when working on the desktop, but then it might be less likely that some application will crash due to it.

Best regards,
Bruno
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