Pattern is the repetition of a design motif that humans find visually interesting. It provides order and variety, and can be intricate or simple. Texture differs from pattern in that it is more irregular and gives the impression of a surface quality, shown through areas of light and dark. Both pattern and texture are important artistic elements for creating visual interest and illusion through techniques like impasto painting, collage using found materials, and trompe l'oeil which aims to fool the eye into thinking a two-dimensional image is three-dimensional.