Meziantou.FrameworkSceneFilter Class
An effect applied to what an element draws (SceneElement.Filter): SceneBlurFilter, SceneDropShadowFilter, SceneColorMatrixFilter, or a graph of SVG filter primitives (SceneFilterGraph).
public abstract class SceneFilterRemarks
The SVG and image renderers draw the filters; PDF has no filters, so the PDF renderer throws NotSupportedException for a scene that has one.