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

[Aashish Chaudhary]

Thanks for the confirmation Ryan. This is almost my next task in the list.
I will provide an update soon.

- Aashish

On Mon, Oct 26, 2015 at 12:28 PM, Ryan Abernathey <ryan.abernathey at gmail.com
> wrote:

> 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>*
>>
>
>


-- 



*| 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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