This comes up all the time..year after year in the C3D forum. People want to easily slice up their volume surface into stages for reporting.
Please add an Elevation-Volume Table tool to Surface Tools. The Stage-Storage tool in C3D fails when you have islands and subsequent multiple equal contour intervals. Need to use a Volume surface for this.
http://forums.autodesk.com/t5/autocad-c ... -p/6814607