I. Design Approach for Accurate Aesthetic Reproduction

1. Accurate Recreations of Original Color Schemes and Detailed Features This design strictly replicates the game’s black-and-yellow contrasting industrial mecha aesthetic, faithfully reproducing every element—including the hollowed-out blade edges, snake‑pattern COBRA engravings, set screws, and segmented armor grooves—on a one-to-one scale. The handle and blade feature precisely replicated hollowed-out slots that echo the original’s streamlined mechanical feel, while the surface texture captures the aged metallic finish of the in-game weapon. AMS multi-color printing allows direct differentiation between the black and yellow color zones, eliminating the need for post‑production hand‑painting.

2. Unified Cobra-Themed Visual Identity A COBRA snake emblem is engraved on the inner side of the blade, echoing the “Shadow Edge” snake‑blade motif. The overall slender, sharply pointed blade shape captures the crisp, aggressive close‑combat vibe of the in-game weapon, delivering strong visual impact whether open or closed.

3. Realistic Butterfly‑Knife Opening and Closing Mechanism An integrated movable pivot enables the butterfly knife to fully simulate the characteristic flicking and opening/closing motions after assembly. All rotating joints are designed with a 0.2 mm clearance to ensure smooth operation without jamming, balancing playability and structural integrity. The entire assembly can be completed using only 3D‑printed components.