[Paraview] Invisible volume rendering in client/server mode

[Utkarsh Ayachit]

Odd. I wonder if it's driver related. Did you build ParaView with
VTK_RENDERING_BACKEND set to OpenGL2? Also, "-tdx"/"-tdy" could indeed
slow things down as it's now rendering for a tiledisplay rather than
for a client. The rendering works in that case, since the client is
rendering on it's own. Also what is the datatype you're rendering? I'd
suspect it's an unstructured grid or a multiblock of unstructured
grid.

Utkarsh

On Sat, Jul 9, 2016 at 3:28 AM, Gunnar Jansen <jansen.gunnar at gmail.com> wrote:
> Dear ParaView users,
>
> I recently set up a pvserver on our small cluster. I used the most recent
> stable ParaView release 5.1 and compiled from source.
>
> The connection and rendering in client/server mode works fine in all
> representations except the "Volume" rendering. Here, depending on the model,
> either no model is shown at all (just the standard 3D render screen), or the
> previous representation with artifacts shows up. This seems to be a problem
> of the --use-offscreen-rendering flag that I use in the pvserver startup.
>
> I run the server on a node with 2 CPU (with 10 cores each) and 2 Nvidia
> Tesla K40c. I start the server with:
>
> xinit /usr/mpi/gcc/openmpi-1.6.5/bin/mpirun -np 4 pvserver -display :0.0
> --use-offscreen-rendering   : -np 4 pvserver -display :0.1
> --use-offscreen-rendering
>
> In the client the threshold for remote rendering is set to 0.
>
> If I pass additionally the -tdx=1 and -tdy=1 flags the volume rendering is
> performed correctly, but the overall speed is decreased greatly.
>
> Thank you in advance for any help!
>
> Gunnar
>
>
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