One of the ongoing challenges web designers have is with background images. Background images are found within the background of a web page, specific DIVs, menus and navigation, sidebars, all over the place.
A well designed pattern or texture that is seamless and tiles well is one that repeats gracefully in the background, complementing the purpose of the site and not distracting. A non-distracting background is one that is literally seamless, no distinction between the edges of the graphic. It doesn’t look like a bunch of repeating blocks. It is one smooth, evenly repeating pattern that is flexible, stretching into the background no matter what the width or length of the web page.
The process involves developing graphics that, when tiled together, appear as one single image, or a gentle repeating pattern. This is often done by selecting simple graphics and blurring the edge or positioning the elements to they bookend to each other, repeating the pattern over and over again.