[vtkusers] changing the graphic properties of a single cell

[jelle]

Hi,

I have a vtkUnstructuredGrid and while picking cells from this ugrid, I'd like
the picked cell to be opaque, and the non selected cells to be transparent. Is
there an efficient way of setting the graphic properties of a single cell? The
other thing to do would be to remove the cell from the ugrid, and to insert it
in another, which would have the opaque property, but that would be somewhat
inefficient. Any other ideas would be much appreciated!

-jelle