FacetChart ChartType.PIE

Could you please provide an example for flattening the FacetChart PIE chart type? I've turned shadowing off, however, I am looking to remove the gradient or darkening around the perimeter that gives the PIE chart the default 3D/bevelled effect.
Thanks

24.7.0 ESR
SmartClient Version: v9.1p_2014-07-06/Pro Deployment (built 2014-07-06)