[vtkusers] using vtkUnstructeredGrid for volume rendering?

[Yuri Ivanov]

Hello; 

I have a vtkUnstructeredGrid which contains in some points and colour values
. I want to do volume rendering but i couldn't do that. I know that there
must be image data to do this. But i only have x,y,z and colour values. Is
there any way to use vtkUnstructeredGrid for volume rendering, or any other
way to do this? 

Thank you in advance..
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