I see you have 3D demo charts you call this way, but these are regular stacked charts displayed in 3D.
Can you also show the columns/bars stacked one AFTER another, on the z axis, like here?
They are sometimes called grouped or clustered columns/bars, and contrast with the side-by-side arrangement.
Thanks,
Cristian
PS: just FYI (in case you don't have it and wonder to implement it) the feature is supported by most other apps showing 3D charts, like Highcharts, amCharts, AnyCharts, Syncfusion ejChart, Microsoft Chart control...