Hello guys,

Thanks to the list I have solved my previous problem,
now I have a question, how do you set up per-vertex
alpha? ... in OpenGL there is a function like
glBlendFunc( src, dst ), I tried to use Appearance but
the whole geometry is transparent, I want just one
vertex to be transparent and the other opaque.  I used
COLOR_4 when creating the GeometryArray, setting the
alpha value in the color component didn't work either.

Any idea how to do this?

Thank you very much.

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