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
public final BaseRenderer getRenderer( int iIndex )
	{
		return brna[iIndex];
	}
	/**
	 * @return Returns the runtime context associated with current renderer.
	 */
	public final RunTimeContext getRunTimeContext( )
	{
		return rtc;
	}
	/**
	 * Renders all blocks using the appropriate block z-order and the
	 * containment hierarchy.
	 * 
	 * @param bo
	 */
	public void render( Map htRenderers, Bounds bo ) throws ChartException
	{
		final boolean bFirstInSequence = ( iSeriesIndex == 0 );
		final boolean bLastInSequence = ( iSeriesIndex == iSeriesCount - 1 );
		boolean bStarted = bFirstInSequence;
		long lTimer = System.currentTimeMillis( );
		Block bl = cm.getBlock( );
		final Enumeration e = bl.children( true );
		final BlockGenerationEvent bge = new BlockGenerationEvent( this );
		final IDeviceRenderer idr = getDevice( );
		final ScriptHandler sh = getRunTimeContext( ).getScriptHandler( );
		if ( bFirstInSequence )
		{