A shader is a specialized program used primarily in graphics processing units (GPUs) to control the rendering of images, effects, and lighting in computer graphics. Shaders are essential for generating visual effects in video games, simulations, and digital media, allowing developers to manipulate how objects and environments appear on screen. While shaders are not inherently malicious, attackers may exploit vulnerabilities in shader code to execute unauthorized actions or compromise system security. In cybersecurity, understanding shaders is important for analyzing potential attack vectors in graphics software and ensuring the integrity of visual processing pipelines.