Normal Mapping

Normal Mapping:

A method for adding surface detail to 3D models without raising their geometric complexity is called normal mapping. Since the normal map is defined in tangent space, one method to solve the problem is to calculate a matrix that converts normals from tangent space to another space and adjusts them with the normal direction of the surface. At that point, all of the normal vectors are roughly pointing in the direction of positive y.

This improves realism in real-time rendering and creates the appearance of complex surface detail.

Enjoy the demo!

References :
- RTR Assignments

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