Beneath the wide brown strip at the bottom of the canvas, glue a straight line of mini-mosaic tiles. Place a few tiles on the strip itself. Outline the top of the strip with 3D/puff paint in a contrasting shade, applying it directly with the nozzle of the bottle (watch out for air bubbles: don't shake the bottle before use...). Add a curved motif in flocking fiber/flock to add some range to the variety of geometrical shapes, applying it with all-purpose adhesive or glossy glue/varnish.