XL's 3D surface charts are pretty limited in what one can do with them.

You may be able to create 2 separate charts and then move one so that it
overlays the other. Adjust the plot area and chart area of the one on top
so that the chart below shows through.

I just tried it and it works quite well.

--
Regards,

Tushar Mehta
www.tushar-mehta.com
Excel, PowerPoint, and VBA add-ins, tutorials
Custom MS Office productivity solutions

In article , "?B?
RGF2aWQgaW4gSmFrYXJ0YQ==?=" <David in
says...
I have created a 3D image of a subsurface reservoir using the 3D surface
chart. I would like to add additional images to the same chart, so that the
chart will illustrate overlying subsurface reservoirs.

I have attempted to do this using Chart - Add data
but the resulting chart will display my original data ... the new data is
displayed as a vertical wall.

Is it possible to display more than one 3D surface image on a single chart
in Excel.

Thanks