[vtkusers] Z-fighting problem on intel hd graphics

Ken Martin ken.martin at kitware.com
Tue Aug 23 12:44:51 EDT 2016

This sounds like a driver issue. I suppose you could try setting the
following environment variable


to switch to software rendering and see if the problem goes away.  If
nvidia and mesa llvmpipe both work on your linux system then I would really
suspect the intel linux driver.

On Wed, Aug 17, 2016 at 6:17 AM, RobertS <spir.robert at gmail.com> wrote:

> Hi all,
> I'm doing simple visualization of data on rectangular grid by creating
> vtkpolydata from single vtktrianglestrip and when running the application
> in
> linux on intel hd graphics there is serious problem with z-fighting where
> the parts that should be far away are overlapping parts that are near the
> camera. This doesn't happen when running on windows (intel or nvidia) or on
> linux with nvidia
> here you can see the problem, the camera angle is still the same
> http://tesla.math.sk/intel1.jpg <http://tesla.math.sk/intel1.jpg>
> http://tesla.math.sk/nvidia1.jpg <http://tesla.math.sk/nvidia1.jpg>
> another angle
> http://tesla.math.sk/intel2.jpg <http://tesla.math.sk/intel2.jpg>
> http://tesla.math.sk/nvidia2.jpg <http://tesla.math.sk/nvidia2.jpg>
> this happens on vtk 7.0 and also on vtk 7.1 from git
> tested hardware is intel hd graphics on haswell, and ivy bridge (mesa 11.2
> and 12.0 with opengl 3.3) and on broadwell with mesa 12.0 with opengl 4.4
> Is this a known issue or am I doing something wrong?
> --
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Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

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