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Filter Effects [http://www.w3.org/TR/SVG11/filters.html] (Filters) are a feature of SVG that allow an SVG viewer to change the presentation of an object in a well-defined manner such as adding texture to a Fill, giving an object a blurred shadow, or modifying the object’s color. Inkscape v0.46 support almost all SVG Filter primitives; v0.47 adds Preset (predefined) filters.