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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi Mark,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>yes the mapper is resizing to max 256x256x256 for 1
component (I think it’s not 128x256x256 as stated in the API doc). Anyway
in both cases this is true if the ZDimension of the volume exceeds 256(128),
otherwise it uses less planes. SampleDistance is fixed when not moving (to the
value you have chosen), but will change to another fixed value while
interacting. This fixed interactive value is calculated once depending on the
size of the volume (so it’s different with every volume you load). You
can find this calculation in vtkVolumeMapper quite at the end.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I think the only way (as a workaround of course) would be a
function that shifts opacity depending on the number of planes.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards<br>
Michael<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>PS: I tried to find a general shift value myself but came to
the above conclusion, it might be wrong though.<o:p></o:p></span></font></p>
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