[Paraview] Revisiting aliasing effect

[Lisa Avila]

Hello Den,

This actually has nothing to do with NVIDIA antialiasing and probably
everything to do with the step size used on the mapper. Most likely the
issue is related to the automatic trade-off of quality to ensure
performance (depending on the mapper being used it will increase step size,
decrease the size of the generated image, and/or decrease the volume size
in order to meet the desired update rate). So either you are not seeing the
"final" image (which should fill in with better quality than the
interactive image) or for some reason the image is taking so long that the
mapper thinks that's the best it can do within its allocated time slice. Do
you see a change in image quality when you stop rotating? Are you having
performance issue while rotating?

Lisa


On Thu, Jan 30, 2014 at 2:45 AM, Den Fairol <den.fairol at infovalley.net.my>wrote:

> Hi,
>
>
>
> I'm a little confused regarding the inconsistent behavior of ParaView
> (v4.x), specifically the quality of its volume rendering representation.
> The Smart/GPU renderer for Windows version is slightly inferior to its
> RayCast renderer counterpart whereas for the Unix/Linux version, it is kind
> of like something you'd expect from a 'B' horror movie (see attachment for
> Smart/GPU-based rendered images). It is mentioned here:
> http://www.paraview.org/pipermail/paraview/2011-June/022062.html &
> http://www.paraview.org/pipermail/paraview/2010-June/017961.html that
> anti-aliasing (AA) is disabled by default. Then how could the Windows
> (Windows 7, NVIDIA Quadro 600 + driver v320.xx) version persist to appear
> so smooth despite setting NVIDIA's Control Panel AA handling to 'Off'?
> Conversely, changing the same option in Linux (Ubuntu 12.04, NVIDIA Quadro
> K5000 + driver v304.xx/v319.xx/v331.xx) to 'Override-application' adds
> nothing to the quality. As of now, RayCasting is may not be a viable
> solution since it induces substantial latency overhead.
>
>
>
> Regards,
>
> Den
>
>
>
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