[Paraview] Volume Rendering Issues/Bugs

[Mohamed Beshr]

Thank you for your reply. Yes I have an unstructured grid. Regarding the
resample to image filter, when I select it in my case, I get an empty
cuboid. Why is that? Is there a way to get the image matching my shape?

On Mon, Mar 26, 2018 at 3:38 PM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> > a.      When I select “Real Time” option and increase the time, even
> though
> > it  is cached, it still keeps reloading which prevents the VR from
> working.
> > Is there any potential/possibility to fix this in the meantime or
> upcoming
> > release?
>
> Caching cannot work in "real time"  mode since there's no guarantee
> what time each frame will be rendered at.
>
> > b.      When I cache it as a volume (rather than surface, wireframe, or
> > points) on my laptop, it crashed the exe even when I increase the cache
> > memory maximum size. Any thoughts on that? I tested it on a bigger and
> > faster work station and it worked, however, it still has the issue
> mentioned
> > in the point below.
>
> I suspect you're just running out of memory on the system, esp since
> you say smaller mesh works.
>
> > 2.      When I get a smaller mesh (4x smaller), I am able to cache it as
> a
> > volume. However, when playing it back, it keeps reloading while showing
> the
> > green bar as below at each time step. Is that supposed to happen? Is that
> > rendering? Is there a way to eliminate it or make it faster?
>
> Yes, that's rendering. Cache doesn't cache rendering artifacts. Seems
> to me you have unstructured grid which is using  the slow path for
> volume rendering. Another option is to apply "Resample To Image"
> filter to resample the dataset to an image and volume rendering the
> result. Then rendering should be much faster. You can also resample
> and generate the image as a processing stage and save the resampled
> dataset out and then load and render it in the animation loop.
>



-- 
Best Regards,
Mohamed Beshr
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