[Paraview] tile edge artifacts with volume rending in parallel mode

[Ryan Abernathey]

We just rebuilt paraview from the latest master with VTK_RENDERING_BACKEND
set it to OpenGL2.

Unfortunately this did not fix the problem with volume rending in mpi mode.

Best,
Ryan

On Wed, Oct 21, 2015 at 7:09 PM, Aashish Chaudhary <
aashish.chaudhary at kitware.com> wrote:

> If you checkout ParaView master and then go into the advance setting, look
> for VTK_RENDERING_BACKEND and set it to OpenGL2 (should be a dropdown if
> using the CMake GUI). Make sure you do it on a fresh build directly
>
> On Wed, Oct 21, 2015 at 6:36 PM, Ryan Abernathey <
> ryan.abernathey at gmail.com> wrote:
>
>> Looks like you are using the OpenGL backend. Is there a possibility of
>>> you switching to OpenGL2 backend?
>>>
>>
>> I would be happy to try this. Could you link me to the relevant
>> documentation describing how to switch backend?
>>
>>
>>> - Aashish
>>>
>>> On Wed, Oct 21, 2015 at 3:37 PM, Ryan Abernathey <
>>> ryan.abernathey at gmail.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> I am trying to do volume rendering of this data:
>>>>
>>>> ftp://ftp.ldeo.columbia.edu/pub/rpa/paraview_netcdf/rce_rrtm303x512dx3f20_512x512x64_3km_12s_128_0000001500.nc
>>>>
>>>> It works fine when Paraview is in regular (serial) mode. But the
>>>> rendering is very slow. I have 32 cores in my workstation, so I tried using
>>>> Paraview in parallel with 16 cores. This goes MUCH faster. But
>>>> unfortunately, artifacts are visible related to the tiling of the data
>>>>
>>>> This image is a screenshot from the serial case:
>>>> [image: Inline image 6]
>>>>
>>>> And this is from the parallel case. Note the grid lines visible in the
>>>> bottom slice.
>>>> [image: Inline image 7]
>>>>
>>>> The state file to reproduce this case is available here:
>>>>
>>>> ftp://ftp.ldeo.columbia.edu/pub/rpa/paraview_netcdf/test_volume_parallel.pvsm
>>>>
>>>> Does anyone know how to fix these rendering issues in parallel mode?
>>>>
>>>> Sincere thanks,
>>>> Ryan Abernathey
>>>>
>>>>
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>>>
>>>
>>> --
>>>
>>>
>>>
>>> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.
>>>   *
>>> *| http://www.kitware.com/company/team/chaudhary.html
>>> <http://www.kitware.com/company/team/chaudhary.html>*
>>>
>>
>>
>
>
> --
>
>
>
> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
> *| http://www.kitware.com/company/team/chaudhary.html
> <http://www.kitware.com/company/team/chaudhary.html>*
>
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