Thank you Ivan, your template is exactly what I want (but I didn&#39;t change the layer blending mode, it must be normal to work properly)<br>See a preview here:<br><br><a href="http://ftpmerou.free.fr/inkscape/blurbackground-2.png">http://ftpmerou.free.fr/inkscape/blurbackground-2.png</a><br>

<a href="http://ftpmerou.free.fr/inkscape/blurbackground-2.svg">http://ftpmerou.free.fr/inkscape/blurbackground-2.svg</a><br><br>Artifacts can be annoying but it might be fixed later, maybe they are due to the IIR Filtering method added in 2007?<br>

<br>By the way, the layer with the &quot;background property&quot; cannot be renamed, changes are not made in the svg.<br>