How to import normal maps 3D models for Unity?

To import normal maps with 3D models in Unity, add the normal map texture to your project folder, then assign it to the model’s material via the Inspector window. Use a "_normal" suffix (e.g., "Sword_normal.png") for Unity to auto-recognize the texture, or manually set its "Type" to "Normal Map" in the texture’s Inspector to ensure proper rendering. If the normal map looks incorrect, confirm your material uses a shader that supports normal maps (like the Standard Shader) and that the texture is linked to the correct slot (e.g., the "Normal Map" slot in the Standard Shader).