Answer :
A normal map is a type of texture used to create the illusion of fine surface details on 3D models without adding additional geometry.
It achieves this by encoding surface normal information into a texture, which simulates variations in surface angles and creates the appearance of bumps, grooves, or other intricate details on the model's surface. Normal maps are commonly used in real-time rendering to enhance the visual quality of models while maintaining performance.
By applying a normal map to a model, the surface can appear more realistic and detailed, even though the underlying geometry remains relatively simple. This technique is particularly useful for creating faux texture on models, as it can mimic the appearance of intricate details without the need for additional geometry or high-resolution textures.
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