by Julieanne Kost
Any filters applied to a Smart Object are automatically “Smart Filters”. Change the filter parameters at any time by double clicking on the filter name in the Layers panel (that’s what makes them smart, they’re nondestructive). Change the Opacity and Blend Mode of the Smart Filter by double clicking the Filter Blending Option (two small lines with triangles under then to the right of the filter name in the Layers panel.) Paint in the Smart Filter mask just as you would any layer mask.