Your bottle 3D model looks fake usually because of insufficient texture details, unrealistic lighting, or inaccurate proportions.
Insufficient texture details—like flat labels or missing glass reflections—make it feel flat and 2D.
Unrealistic lighting—too harsh or without soft shadows—doesn’t mimic real light, which always creates subtle gradients.
Inaccurate proportions—such as a neck that’s too thick—break visual familiarity with real bottles.
Fix it with simple tweaks: add subtle textures (like minor glass scratches) or use soft, diffused lighting. These small changes quickly reduce the "fake" feel without extra complexity.