Physiological constraints prevent viewers from seeing an entire surrounding scene at once.
Successive views are the input.
One possibility is that visuospatial expectancies guide and facilitate integration. This spatial extrapolation appears to be rapid and automatic. In all conditions, subjects remembered exploring a greater expanse of the scene than they actually had. Mental extrapolation of spatial expanse appears to be inherent in memory for scenes regardless of whether the primary modality is vision or touch. Implications for scene perception and cross-modal representation are discussed.