To emphasise one particular polygon area, I have used rule-based styles (QGIS) to apply a 50% transparency white fill to every polygon but the one I am interested in. This polygon layer is above all the others in the stack, with the result that all the mapping outside the emphasised polygon is 'faded out'.
However, any and all labels attached to places and roads are not faded out, even though the text layers in question are underneath the 'fade out' polygon layer.
How can I fix this?