public static Matrix GetRectangleClipGeometryTransform(SceneElement element) { RectangleGeometry rectangleGeometry = element.GetLocalValueAsWpf(Base2DElement.ClipProperty) as RectangleGeometry; if (rectangleGeometry != null) { Transform transform = rectangleGeometry.Transform; if (transform != null && !transform.Value.IsIdentity) { return(transform.Value); } } return(Matrix.Identity); }