Interior Design is a profession concerned with anything that is found inside a space - walls, windows, doors, finishes, textures, light, furnishings and furniture. All of these elements are used by interior designers to develop a functional, safe, and aesthetically pleasing space for a building's user.
The work of an interior designer draws upon many disciplines including environmental psychology, architecture, product design, and traditional decoration (aesthetics and cosmetics). They plan the spaces of almost every type of building including: hotels, corporate spaces, schools, hospitals, private residences, shopping malls, restaurants, theaters, and airport terminals. Today, interior designers must be attuned to architectural detailing including floor plans, home renovations, and construction codes.

Trompe-l'œil, which can also be spelled without the hyphen in English, (French: "trick the eye") is an art technique involving extremely realistic imagery in order to create the optical illusion that the depicted objects appear in three-dimensions, instead of actually being a two-dimensional painting.