[vtkusers] Is there anyone can give me a solution about Light effect in vtk?

[liujia]

Hi all,
    I have ask these twice.
    I wrote a script in Tcl about 3D-chart display.
    But I don't know how to make the 3D models neglecting lights effect.
    Is there any method to let a white plane do not show gray when it been rotated.
    Thanks!
leyouliu
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