[vtkusers] raycasting scalar field - does size matter?

[jhirsch]

Hello Peter, 
I'm sorry that no one answerd your question. I had the same problem and it
cost me several days to figure out that the answer is 'yes'. Size does
matter. ParaView manages to set this automatically. Developing only in C++
and VTK (6.3) you have to set SetScalarOpacityUnitDistance of the
vtkVolumeProperty manually, at least this is the way I know so far. 
For example the default value is 1.0. I had to change that to something like
0.000X in order to see my object that is a couple of millimeters in real
life.



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