Real-time rendering is the process of generating images from 3D models at high speeds, allowing for immediate visual feedback. This technique is commonly used in video games, simulations, and virtual reality, where users expect to see changes instantly as they interact with the environment. To achieve real-time rendering, powerful graphics hardware, such as GPUs (Graphics Processing Units), is utilized to perform complex calculations quickly. Techniques like level of detail and culling help optimize performance by reducing the amount of data processed, ensuring smooth and responsive visuals during user interactions.