Use to create shiny patterns
Seamless Images are any images in forms of background, textures, patterns, etc. that can be viewed and have infinitive patterns and designs. An image is considered seamless when, of course, it doesn't include any seams which may affect the editing or quality of the image.
An image is seamless when it is at all times at the best quality, and it can be edited without further problems or interruptions. For example, you wish to make a texture or background seamless. In order to do the modifications, do a pre-averaging of the intensity between the dark and light areas until you get a perfect consistency.