Why is bottle 3D model so unrealistic?

A bottle 3D model often feels unrealistic due to three key issues: too few polygons, low-quality textures, or missing real-world light/material interactions. Polygons shape the model—too few create jagged edges instead of a bottle’s smooth curves. Low-res textures (blurry labels, fake glass shine) or mismatched materials (e.g., plastic looking like glass) ruin authenticity. Skipping how light bends through glass or reflects off glossy surfaces also makes it look fake. To fix it, increase polygon count for smoothness, use high-res textures that match the actual material, and add basic light interaction (like refraction) in your 3D tool.