You can determine the amount of scaling in the Y-axis or X-axis direction in relation to the height (Z-axis) of the cube by specifying the amount for the YScale and XScale properties.
You can specify the scaling programmatically through the YScale and XScale properties or you can specify it at design time through the Chart3D Wizard or the Chart3D Properties designers. For additional information on these designers, see Design-Time Tools for Creating 3D Charts.