Artists are motivated by different things and they use different mediums to express their art. Nature is one of the areas that motivates me highly. Sometimes I will take photographs or sketch something I find strikingly beautiful.
Architecture and other art forms motivate. If someone used a pattern, shape, texture in one medium, how can it be used in another.
Printed material can become three dimensional. A large object can be created much smaller and used in a different way.
Symbols can be combined to create a whole different meaning than when representated alone.
Patterns buried underground and rediscovered can become new.