1. A computer-implemented method for defining a range of bounding parameter values that satisfy perceptual constraints for a computer-generated scene having a computer-generated object in view of at least one camera of a pair of cameras, the method comprising: accepting a user selection of a bounding parameter from a set of scene parameters comprising: a working distance (d) of the computer-generated scene, wherein the working distance (d) is measured from the pair of cameras to a point in the computer-generated scene, a focal distance (f) for the pair of cameras, a sensor width (W c ) for the pair of cameras, a separation distance (t) between the pair of cameras, an inter-ocular distance (e) between a left perspective position and a right perspective position of the modeled viewer, and a screen width (W s ) for a modeled screen; obtaining values for scene parameters of the set of scene parameters that were not selected as the bounding parameter; calculating a first bounding value for the bounding parameter based on a first perceptual constraint and based on the values of the scene parameters of the set of scene parameters that were not selected as the bounding parameter; calculating a second bounding value for the bounding parameter based on a second perceptual constraint and based on the values of the scene parameter of the set of scene parameters that were not selected as the bounding parameter, wherein the first and second bounding values define a minimum and a maximum value of a range of values for the bounding parameter that satisfy the first and second perceptual constraints; and storing the first and second bounding values for the bounding parameter.