[vtkusers] volume rendering content does not fit into the isosurface

[Peter]

Dear All,

i have a question, i am doing some rending for a 3D object.

first i did isosurface rendering for the objects.
then i did volume rendering.

these two rending process in same file, but when i run the script,
the volume rendering content does not fit into the isosurface, i tried
to find the problem, but i still can't figure it out by far. i suppose
the volume rendering content should exactly fit into the isosurface.
but the result showed that there are just some part of
overlapping.....

so can someone out there to help me out on this issue...

thank you in advance,

Yours
Pan