[Paraview] Volume Rendering in Paraview - Speed

[Christian Werner]

Gee, now that I've posted this I came to find quite the same topic 
treated before:

http://www.paraview.org/pipermail/paraview/2009-February/011174.html

I am now looking for a way to make it possible to switch between 
different mappers from within paraview. I will post how to that once I 
figured out.

Best regards!


Christian Werner wrote:
> Hello!
>
> I am working on a diploma thesis on defect analysis in cast iron. I 
> found ITK to be the perfect tool to manipulate my volume data. Now I 
> am looking for a tool for visualization. At fist, Paraview seemed to 
> be the perfect choice because of its VTK-Plugin capability (and thus 
> ITK). The bad thing is that the rendering is far too slow for my 
> needs. At this point I could as well store my results in a new file 
> and view them in another (faster) viewer. Of course this is not the 
> perfect way either.
>
> Am I missing some configuration or something? What I do is loading a 
> raw volume (dimensions: 256x256x110), go to the display tab and choose 
> the following options:
>
> Color:
> Interpolate Scalars: OFF
> Map Scalars: OFF
>
> Style:
> Representation: Volume
> Interpolation: flat
> Material: none
>
> Which seems to be the most basic setup for rendering. When the volume 
> is loaded I get frames every 5 seconds. The quality is good, no 
> problems there, but any other generic Volume Renderer gives me 20FPS+ 
> (using Textures). Maybe it's because the actual mapper does Ray 
> Casting(?). There is a field "Volume mapper" in the display tab under 
> "Style" but it's not enabled so I can't change anything there...
>
> Has anybody some good advice?
>
> Best regards,
> Christian Werner
>
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