Bug 194727 Pyramid chart with 2d+ dimension should like a pyramid
Pyramid chart in 2d+ dimension should like a pyramid, rather than a triangle with depth effect. In addition, pyramid in 2d+ should like itself in 3d as well. Take a look at attached screenshot to compare the charts.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
protected void validateNullDatapoint( DataPointHints[] dphs )
			throws ChartException
	{
		if ( dphs == null )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.VALIDATION,
					"exception.base.orthogonal.null.datapoint", 
					Messages.getResourceBundle( rtc.getULocale( ) ) );
		}
	}
	/**
	 * This method validates the dataset state from given series rendering
	 * hints.
	 */
	protected void validateDataSetCount( ISeriesRenderingHints isrh )
			throws ChartException
	{
		if ( ( isrh.getDataSetStructure( ) & ISeriesRenderingHints.BASE_ORTHOGONAL_OUT_OF_SYNC ) == ISeriesRenderingHints.BASE_ORTHOGONAL_OUT_OF_SYNC )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.VALIDATION,
					"exception.base.orthogonal.inconsistent.count", 
					new Object[]{
							new Integer( isrh.getBaseDataSet( ).size( ) ),
							new Integer( isrh.getOrthogonalDataSet( ).size( ) )
					},
					Messages.getResourceBundle( rtc.getULocale( ) ) );
		}
	}