[Paraview] Minimum system requirement for PV 4.3 volume rendering?

[Burlen Loring]

Hi Ruq,

I'm not sure why it works in 4.2 and not 4.3. I assume someone else 
reading this who knows about the recent changes could comment.

The error message shows  some missing open gl extensions. Are you sure 
you have the latest driver installed?  GL_ARB_multitexture is not 
typically an issue, unless you are using the default MS driver. Also are 
you sure the error messages are the same on both systems? If not, it 
would be helpful to see all the messages on both systems.

Note: the AMD drivers have a bug that prevents projected tetrahedra from 
working. This should be disabled on the system with the AMD card.

In general when you have issues with one volume rendering method you 
could work around it by using a different one. In the "properties panel" 
under the "display" group there are some controls relating to the volume 
renderer. One labeled "select mapper" lets you chose different 
algorithms. For instance try to change it to "Bunyk Ray Cast". In 
general the "ray cast" options are slower but more dependable.

Burlen

On 02/24/2015 11:18 PM, Xu, Ruqing wrote:
> Hello,
>
> I've installed PV 4.3 on a few PCs, all of them running Win 7 64-bit. 
> What I've found is that volume rendering, curiously, works on some of 
> them and fails on others. The error messages I got look like this:
> =========================================
> ERROR: In 
> C:\DBD\pvs-x64\paraview\src\paraview\VTK\Rendering\VolumeOpenGL\vtkOpenGLProjectedTetrahedraMapper.cxx, 
> line 188
>
> vtkOpenGLProjectedTetrahedraMapper (0000000013AB80B0): The required 
> extensions are not supported.
>
>
>
> Warning: In 
> C:\DBD\pvs-x64\paraview\src\paraview\VTK\Rendering\OpenGL\vtkOpenGLExtensionManager.cxx, 
> line 781
>
> vtkOpenGLExtensionManager (0000000013567D60): Attempting to load 
> GL_ARB_multitexture, which is not supported.
>
>
>
> ERROR: In 
> C:\DBD\pvs-x64\paraview\src\paraview\VTK\Rendering\OpenGL\vtkOpenGLExtensionManager.cxx, 
> line 787
>
> vtkOpenGLExtensionManager (0000000013567D60): Extension 
> GL_ARB_multitexture could not be loaded.
>
> ===============================================
>
>
> This seems to only happen to the relatively old PCs (~ 4 or 5 years 
> old). For example one of them has graphics card of ATI Radeon HD 3450 
> (Microsoft Corporation WDDM 1.1), driver version 7.14.10.0018; another 
> laptop has Intel HD graphics, driver version 8.15.10.2559. - I'm 
> wondering if these are considered insufficient for volume rendering to 
> work with PV 4.3.
>
> More curiously, volume rendering seems to run OK with PV 4.2 on these 
> machines.
>
> Thanks,
>
> -Ruq
>
>
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