Ch. 8 Theatre

representing the lines of an object as shorter than they actually are in order to give the illusion of proper relative size

the point on the horizon to which a set of parallel lines recedes

a line in a perspective drawing representing the meeting of the earth and the sky; normally drawn parallel to the top or bottom edge of the paper

the base of the vertical plane in a perspective drawing; for a proscenium sketch, usually drawn across the stage in contact with the downstage edge of the proscenium arch; in a thrust drawing, normally placed just outside of the auditorium end of the thrust; in an arena sketch, usually placed in the aisle closest to the observer

the vertical line drawn from OP to the floor line in a perspective grid; represents the line of sight from the observer to the vertical plane

the bottom edge of a perspective drawing