Create a classic Roblox-ready 3D prop in Default style for Returnbound: an old brass key that feels like a personal object carried by someone who almost escaped, target size 1.25 x 0.45 x 0.10 studs, 1,000 to 1,500 polygons preferred and never above 10,000, chunky low-poly silhouette, simple bevels, worn grip, slightly bent shaft, tiny cracks represented with broad readable shapes, places for subtle blue and faded gold memory glow, emotionally restrained horror, not photorealistic