To make a cosmetics 3D model look photorealistic, focus on accurate material texturing, realistic lighting, and fine surface details.
Material texturing should mirror real-world properties—like glass for perfume bottles (clear, reflective with subtle refraction) or matte plastic for lipstick tubes (soft, non-glossy). Lighting should replicate professional product shots: use soft, even light to highlight contours without harsh shadows, and add faint reflections (e.g., a studio wall on a bottle). Fine details like embossed logos, label textures, or tiny scuffs make the model feel tangible.
For beginners, try free texturing tool trials (e.g., Substance Painter) to practice common cosmetic materials, and use real product photos as references to match lighting and details closely.