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Light sources are not just used to light up the environment and make the object visible. By generating shadows and illumination variations on the object surface, they give the image an effect of relief and make it more realistic.Which light sources can I use in Real Time Rendering? A Spot light:It projects a cone of light from a given point to a given direction. It is the only type of light source which concentrates light rays on a specific part of the scene. It is thus very useful to highlight details.A Point light:It scatters light in all directions from a given point like an electric lamp.
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