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Whats up guys and welcome back. In the previous video we got introduced to the shadow mapping technique for the rendering of, well, shadows. Weve used a spot light as the light source because this is the simplest type of light to implement. Now lets jump right into the next type of light which is a directional light. [intro music] Before we begin I just wanna say that Im going to assume that you are familiar with the basics of shadow mapping. If you havent seen the previous video make sure to watch it right now. Check out the link in the video description below. Alright, so the reason that the spot light is the simplest type of light when it comes to shadow mapping is because we can use perspective projection when generating the shadow map. We move the spot light to the origin of the coordinate system and we rotate the world around it so that the spot light ends up looking down along the Z axis. It can be the negative or positive Z axis depending on whe