My diagram uses TemplatedNodes that in their DataTemplate use a Rectangle with a Fill set to a DrawingBrush. The DrawingBrush is defined in XAML and uses a DrawingGroup with multiple GeometryDrawing objects. When I export the Diagram to JPG, BMP, PNG, etc., the DrawingBrush shows up properly. However, when I export to PDF, the Rectangle is just filled with a solid colour.

Is there anything I can do to get the Rectangles/DrawingBrush to render correctly in the PDF?

Thanks.