Introduction
Bump mapping simulates the bumps or wrinkles in a surface without the need for geometric modifications to the model. The surface normal of a given surface is perturbed according to a bump map. The perturbed normal is then used instead of the original normal when shading the surface using the Lambertian technique. This method gives the appearance of bumps and depressions in the surface.
Scene without texture mapping
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Bump Generated
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Scene with bump mapping
I have chosen the ground to generate the bump effect as the ground is rough. The ground is generated using two polygons, the ground under the "ventilation system" and the ground with the bump effect. From the picture, we can clearly see that the bump effect makes a lot of difference to the whole picture.