[Paraview] Blurred volume rendering

[Aashish Chaudhary]

Thomas,



On Mon, Nov 30, 2015 at 10:34 AM, Thomas Oliveira <thomas.oliveira at gmail.com
> wrote:

> Dear Aashish,
>
>
> I'm using Paraview 4.4.0 64-bit , OpenGL Version 4.5.0 NVIDIA 352.55,
> OpenGL Renderer Quadro K600/PCIe/SSE2.
>
> Tweaking the transfer function improved the result, but the corners are
> rendererd rounded, whereas in the original file I have only cubic voxels.
>

I am wondering if that would be because of the interpolation (linear vs
nearest) since linear will smooth out the edges just a bit. Is there a
sample dataset you can send my way?


> I though that unsetting "Properties > Scalar Coloring > Interpolate
> Scalars Before Mapping" would improve the image, but I saw no change.
>
> You suggested to enable shading, but I couldn't find it. Where is it?
>

Its on the same panel (left side), scroll to the bottom or search for
"shade" you should be see it.

- aashish

>
>
> Thank you for your help,
>
> Thomas Oliveira
>
>
> On Mon, Nov 30, 2015 at 3:07 PM, Aashish Chaudhary <
> aashish.chaudhary at kitware.com> wrote:
>
>> Hi Thomas,
>>
>> On Mon, Nov 30, 2015 at 8:54 AM, Thomas Oliveira <
>> thomas.oliveira at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> The Sample.png file attached is an image of a pore medium. Each voxel in
>>> the image is a cube that is either solid or void.
>>>
>>> The Zoom.png file attached is a zoom of it, where it can be seen that
>>> the curved interior solid walls are approximated by a staircase
>>> discretization.
>>>
>>> How can I render this staircase geometry more clearly?
>>>
>>
>> Did you try to tweak the transfer function? Also, you can enable shading
>> to have a look of a solid surface.
>>
>>
>>> I have tried tweaking many properties on ParaView but I still get it
>>> blurred.
>>>
>>
>> Just to be sure, what version of ParaView you are using and what OpenGL
>> backend?
>>
>>>
>>> Thank you for your help,
>>>
>>> Thomas Oliveira
>>>
>>>
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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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