[vtkusers] limit number of clippingplane..??

[heochy at hotmail.com]

Hi~

I'm use vtkVolumeTextureMapper2D class.
but, error occurred.
"OpenGL guarantees only 6 additional clipping planes"
could be used above 6 clipping planes??

And, It isn't like free-line to clipping planes??????
please, answer to question...