Theater has undergone many technical and technological developments, as well as all other fields,  the impact of technological development on the stage and its equipment, on the visual image and the whole theater, and many artistic and theatrical trends appeared, whose role affected the theatrical image, with the digital development and the emergence of computer programs. This affected the design process of the theater and theater lighting, and enabled designers to create and digitize their theatrical designs. Computer software has continued to develop and have a clear impact on design, until researchers have developed several computer programs, which can be manipulated by digital variables and mathematical equations and modified by making radical formal changes and end-designs. The designers called these formal variables the term "parametric" from which the architectural trend called "parametric trend" appeared.