Shadows play a pivotal role in the realism and depth perception of computer-generated imagery (CGI). By accurately simulating the way light interacts with objects and their surroundings, shadows enhance the visual fidelity of virtual environments, contributing to the overall immersive experience. This research delves into the intricate process of creating realistic shadows in computer graphics, with a particular focus on the differences between smooth and hard shadows, and the application of ray tracing techniques.