I have a frame, and within the frame is a square (outer square), and superimposed on the square is another, somewhat smaller square (inner square).
I want the effect of the outer square having a fill and the inner square being transparent.
How do I achieve this effect? I’ve tried masks, blend modes, grouping and fattening, but regardless of what I attempt, the outer square’s fill shows when I set the inner square’s opacity to 0.