In this detailed breakdown, I walk you through how Sean’s Crafts built a Spider-Man (Miles Morales) mask with moving eyes and no electronics—and I point out 23 subtle “why this works” decisions along the way. The big theme is research + planning first: pull real references from the movie, then lean on existing templates when they’re available, and only customize where it actually improves the build (like resizing the eye openings). I also talk about what I call the B.O.B. (Best Order of Build): prototype fast in thin corrugated or cereal box cardboard, test-fit early, then lock in the shape once you know it fits your face. After the cardboard shell is right, I explain the durability/finish stack: resin (epoxy) to harden the thin shell, a quick sand to prep, spackling to erase seams, then another sealing layer because spackle is soft and can crack. I also call out tool and glue choices—super glue makes more sense than hot glue here because thin joints are cleaner and hot glue sands terribly. Finally, we get into the moving-eye mechanism: Bristol board shutters, a thumbtack hinge, low-friction fishing line, and bike brake cables for push-pull control. The takeaway is simple: use easy materials to find the shape, then reinforce and refine once the geometry is proven.