Hello Bill,
You can change the Elevation property of the pie chart projection:
NPieChart chart = new NPieChart();
chart.Enable3D = true;
nChartControl1.Charts.Clear();
nChartControl1.Panels.Add(chart);
chart.Projection.Type = ProjectionType.Perspective;
chart.Projection.Rotation = 0;
chart.Projection.Elevation = -60;
Values around -60 produce similar results to the image that you sent us.
Best Regards,
Nevron Support Team