[Paraview] How to stop ParaView using LOD for volume rendering

[David E DeMarle]

Yes I think it is a bug.

It does the same on my machine and I could see when, given a fast enough
machine/small enough volume, you might want it not to do that.

You might expect the LOD Parameters controls to affect this but they do not
since they only pertain to surface rendering.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Tue, Jan 3, 2012 at 10:47 AM, Joe Ping-Lin Hsiao <phsiao at cs.unc.edu>wrote:

> Hi David,
>
> Both ParaView 3.8.1 and 3.12.0 does the same thing for volume
> rendering. I wonder if it's a bug or only happened on my computer. To
> explain better, I have attached two images. One is during rotation
> while I was holding down the mouse button, and one is after I released
> the mouse button. You can see the aliased edge of the blurry
> rendering, and after I released the mouse button, it takes about one
> second for ParaView to change back to the non-blurry rendering . If
> this still looks like a bug to you, I'll file a bug report.
>
> Thanks,
> Joe
>
>
> On Tue, Jan 3, 2012 at 9:51 AM, David E DeMarle
> <dave.demarle at kitware.com> wrote:
> > Looks like a bug to me. Please file a bug report.
> >
> > David E DeMarle
> > Kitware, Inc.
> > R&D Engineer
> > 21 Corporate Drive
> > Clifton Park, NY 12065-8662
> > Phone: 518-881-4909
> >
> >
> > On Mon, Jan 2, 2012 at 3:29 PM, Joe Ping-Lin Hsiao <phsiao at cs.unc.edu>
> > wrote:
> >>
> >> Hi,
> >>
> >> When I created a wavelet source and switched to volume representation,
> >> I noticed that the volume rendering becomes a bit blurry when I rotate
> >> the data, and about one second later after I stopped the rotation, the
> >> rendering switches back to the non-blurry data. It seems to me
> >> ParaView was doing LOD for that. I experimented with disabling
> >> "Immediate Mode Rendering" and "LOD Threshold" in "Setting" but no
> >> success.
> >>
> >> Is there anyway to stop this behavior, such as deriving my own mapper,
> >> or force ParaView to use GPU rendering?
> >>
> >> Thanks,
> >> Joe
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