sci-fi drone 3d model

do same for this one.Generate a high‑quality 3D model of a robotic enemy called a Sentinel. It is a hovering drone composed of concentric metal rings with glowing red energy cores. The rings are interconnected by faint energy beams. The robot has no legs; instead, it floats using anti‑gravity. In its center is a pulsing red orb. The design should feel alien and menacing. The model should be rigged with a simple skeleton (root, main body, rings that can rotate) for hovering animations. Include PBR textures with emissive maps for the red glow. Style: sci‑fi, slightly transparent materials with particle effects implied. Polygon count: 15,000–20,000 tris. Export in FBX format with textures.