How do computer graphics smooth polygon edges so that objects look less blocky?

In computer graphics, the process of smoothing jagged polygon edges to make them appear less blocky is known as anti-aliasing. This technique is essential for ensuring that the underlying construction of objects from polygons is not obvious to the naked eye.1

Several methods are used to achieve this smoothing effect:

• Multisample Anti-aliasing (MSAA): This technique reduces jagged edges by taking multiple samples—or measurements—at different locations within a single pixel to determine its final appearance, resulting in smoother edges.2
• Supersampling Anti-aliasing (SSAA): The GPU renders the image at a resolution higher than the target display resolution and then shrinks it down. This extra information creates finer detail and smoother edges, though it requires significant processing power.2
• Deep Learning Super Sampling (DLSS): This approach renders an image at a lower resolution and uses an AI model to reconstruct a higher-resolution output. By estimating the necessary detail based on learned patterns, it produces a sharper image while maintaining high performance.2

These techniques are part of the broader field of computer graphics, which focuses on the efficient rendering and display of images.1