Perlin noise is a gradient noise function used in computer graphics to create natural-looking textures and patterns. Unlike random noise, which can appear chaotic, Perlin noise produces smooth transitions and variations, making it ideal for simulating organic elements like clouds, terrain, and water. Developed by Ken Perlin in the 1980s, this algorithm generates coherent noise by interpolating between random gradient vectors. Its applications extend beyond graphics, influencing fields such as procedural generation in video games and simulations, where realistic environments are essential for immersion and visual appeal.