1. Processing circuitry that at least assists in the delivery of a three-dimensional presentation for a first viewer via a screen assembly, the first viewer having a first viewing reference, the processing circuitry comprising: first circuitry that at least assists in producing first reference data corresponding to at least one aspect of the first viewing reference of the first viewer; second circuitry connected to the first circuitry that delivers a first control signal, the first control signal relating at least in part to the first reference data; and third circuitry that at least assists in producing second reference data corresponding to at least one aspect of a second viewing reference of a second viewer; the second circuitry being further connected to the third circuitry and configured to deliver the first control signal and a second control signal to cause the modification of the adaptable display characteristic of the screen assembly, the second control signal relating at least in part to the second reference data.