The term "picture plane" refers to the imaginary plane that divides the space in front of an observer into two parts: the visible area where objects can be seen and the unobservable area behind it. This term is commonly used in the field of art and design to refer to the surface on which an artist creates a two-dimensional image. While there are no direct synonyms for this term, related terms such as "artistic surface," "two-dimensional canvas," and "visual substrate" may be used to describe the same concept. When discussing the picture plane, it is essential to consider how the selected surface affects the perception of the final artwork.