Composition is a very important photographic tool.
Composition is used to present a worthwhile subject in the most effective way. Many types of patterns can be legitimate targets for pattern images.
The image of the Sydney Opera House is an example of a subject which can be illustrated by strong patterns and also with strong diagonal lines across the image. The patterns generated by the tiles of the Opera House roof in Sydney illustrate the form of an abstract design.
Many different patterns are evident in architecture and there are also many patterns evident in nature.