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Hi VTK users,
<br>
<br>
We develop a viz system using vtkVolumeTextureMapper3D for volume
rendering. Recently, we've moved up from v5.1 to v6.2. After that,
we notice our viz system has a significant slow-down in rendering
speed (compared on the same computer) when volume size is large, say
LxWxH ~= 512<sup class="moz-txt-sup"><span
style="display:inline-block;width:0;height:0;overflow:hidden">^</span>3</sup>.
It can always render small volumes at interactive rate. I know
vtkVolumeTextureMapper3D needs to resample large volume to fit in
128*256*256 (BTW, our data is regular volume data with a single
component). But this down-sampling process is not new in 6.2. Are
there other changes that cause the performance issue? Do anyone
experience the same issue? Thanks.
<br>
<br>
Best,
<br>
Weiguang
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