Patch-based synthesis is a technique used in computer graphics and image processing to create new images by combining small sections, or "patches," from existing images. This method allows for the generation of textures or patterns that maintain a natural appearance by ensuring that the selected patches blend seamlessly with one another. In this approach, algorithms analyze the source images to identify similar patches based on color, texture, and structure. By carefully selecting and stitching these patches together, artists and designers can produce high-quality visuals for applications in video games, film, and virtual reality.