Note that this only applies to blend modes applied via the "blend mode" selector UI. If people want to use feBlend directly as a filter, that usage should probably not trigger the "backstop rectangle". Also note that this workaround is only useful if "blend modes" are restricted to layers.
Note that this only applies to blend modes applied via the "blend mode" selector UI. If people want to use feBlend directly as a filter, that usage should probably not trigger the "backstop rectangle". Also note that this workaround is only useful if "blend modes" are restricted to layers.