Dynamic Square Screen

theoretical concept proposed by Sergei Eisenstein for a cinema screen in the shape of a square. This neutral canvas would allow for the projection of multiple, variable aspect ratios—horizontal, vertical, or otherwise—within the same film, enabling the editor and director to change the frame geometry dynamically to match the dramatic needs of each shot or sequence. This concept was a radical, early theoretical challenge to the fixed horizontal standard, envisioning a flexible frame that could adapt its geometry—including vertical and other orientations—to suit the dramatic and compositional needs of the shot.