Virtual environments are increasingly used to visit virtual mockups of proposed buildings or virtualized models of real buildings. This paper presents the results of a human-machine interaction experiment aimed at measuring the effects of the field-of-view and of the use of a third joystick axis on human performance in virtual walkthroughs in a closed-space environment. The results indicate that neither the FOV nor the third joystick axis significantly affect performance. There is however a perceived increase of immersion with the larger FOV, and an added freedom of movement when a third axis of movement is mapped onto the joystick.
