[Paraview] How to do volume rendering of image data?

[Steve Huntley]

I guess there was a communication problem. It seems you're still looking 
at the first file I attached in an earlier message: molar.vtk. I created 
a new file with the lookup table called molar.look.vtk and attached it 
to the later message that discusses lookup tables and opacity.

Moreland, Kenneth wrote:
> Uh, what lookup table? The data file you posted has no LOOKUP_TABLE 
> entry. Even if it did, the VTK format specifies that the LOOKUP_TABLE 
> is applied to a SCALARS entry whereas the molar.vtk file has data 
> stored as COLOR_SCALARS. Even if the RGB values were listed under a 
> SCALARS entry (which is an error in itself), the lookup table cannot 
> be applied to a vector. VTK specifically defines a lookup table as 
> something that converts scalars to colors. I’m not sure what the 
> interface would look like for a lookup table that operated on vectors 
> in either the VTK API or in a GUI.
>