Hi Tim,

The control does not regard the transparency propery when building a 3D image map. One way to work around this is to have several line series that display lines at the ticks - will that work for you?

I don't understand your reply.  Let me explain alittle more.

My contour plot is done with the grid surface chart.  It is very similar to the nevron chart gallery/grid surface/contour example.  I use the top wall to draw a grid over the top of the contour data.  But I guess that with the top wall on, when I do a hittest the result only shows the wall.  I need the hittest to show me data points so I can reflect the data that the mouse is hovering over.  This allows the operator of my program to determine the exact value of a data point that he is looking at.  Is there a way to remove the top wall as a component that will designate a hit?  Or is it not possible to do what I am trying to do?  Maybe your response is another way to do it, but I don't understand.  I don't see how having line series will help me get a hittest of the datapoints.