What are the best manual unwrapping for unwrap metallic 3D models?

The best manual unwrapping for metallic 3D models prioritizes edge-based seam placement (hard surfaces like armor) and planar mapping (flat reflective panels) to preserve texture continuity and minimize stretching—essential for realistic metallic reflectivity. - Seam Placement: Mark seams along natural lines (joints, gaps) or less visible areas (e.g., under rims) to hide splits and avoid breaking reflections. - Planar Mapping: Use this for flat, reflective parts (like armor plates) to keep textures smooth and consistent. - Refinement: Use relax tools to even UV density, ensuring uniform wear, scratches, or finish details—critical for metallic realism. For beginners, practice with simple objects (e.g., a metal cup) to master seam placement—clean UVs prevent uneven metallic effects in renders.