Abstract: The subject of the invention is a catalytic filter for the treatment of solid particles and gaseous pollutants coming from the combustion gases of an internal combustion engine, comprising a porous matrix forming an assembly of longitudinal channels separated by porous filtering walls based on or consisting of silicon carbide or aluminum titanate in the form of interconnected grains. The filter according to the invention is characterized in that: said grains and grain boundaries of said porous filtering walls are covered over at least 70% of their surface area with a texturing material, said texturing consisting of irregularities, the sizes of which are between 10 nm and 5 microns; and a catalytic coating or washcoat at least partially covers said texturing material and optionally, at least partially, the grains of said porous filtering walls.