The best way to style a car 3D model is to use real-world references, refine realistic textures/materials, and apply strategic lighting to highlight design features.
Ground your model in authentic details—match metallic paint sheen, tire tread depth, or plastic trim finish using real car photos or specs. This avoids "digital flatness" and keeps the design true to life.
For beginners, start with a reference photo to guide proportions, test basic materials (e.g., glossy paint, textured rubber) in your software, and adjust lighting slowly (studio or natural) to emphasize curves or brand-specific lines.