Issue No. 04 - October-December (1981 vol. 1)
B.J. Schachter , Westinghouse Defense & Electronics Systems Center
Visual simulation seems to imply image realism-though visual simulation systems can produce realistic images, their main goal Is training effectiveness.
B.J. Schachter, "Computer Image Generation for Flight Simulation", IEEE Computer Graphics and Applications, vol. 1, no. , pp. 29-68, October-December 1981, doi:10.1109/MCG.1981.1674014