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This iteration includes content that has many subtle details that have to be taken care of. In addition to the advanced lights, HDR imaging and tonemapping support are also added to the raytracer.Directional lights are the most straightforward type of light to implement. They only have a radiance and a direction, and in that direction, the radiance is applied. During the illumination of an object, one has to calculate the vector magnitude of normals and light directions. In my case, they are bot...