Courtyard and sunken courtyard rendering

Quick answer：

Courtyard and sunken courtyard renderings are visual representations of outdoor spaces, typically seen in traditional or modern architectural designs. A courtyard is an open space enclosed by buildings, often used for socializing or gardening. A sunken courtyard, also known as a courtyard garden, is a courtyard that is lower in elevation than its surroundings. These renderings are used to depict the layout, design, and aesthetic of these spaces before construction.