The illustrated hero background (watercolor countryside, cottage) needed to dissolve into the brand's cream background at the edges — but a standard blur/gradient looked flat next to the painterly art style. Built a small custom tool (canvas + JS) that applies ordered Bayer dithering to fade the illustration into the background color pixel-by-pixel instead of blending — it reads as grain, not gradient, and matches the hand-painted texture instead of fighting it. Turned it into a reusable tool with adjustable fade area, blur radius, dot size, and a transparent-overlay export, so it's not a one-off script.