Third Dimension Movies And E X P A N D E D Screen (1953)

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THREE-DIMENSIONAL MOTION PICTURES 33 cisely the same size. In the figure below, the angle A will appear either nearer or farther away, just as one regards the figure as leaning forward and a little to the right, or as leaning backward and a little to the right. The reader may have a little difficulty at first in realizing this, and it will be necessary to fix your eye on the point you wish to seem nearer, either A or B. Every part of the figure being in the same plane, it is evident that no muscle of the eye are concerned in this action. It is a mental action pure and simple. The Illusive Appear ance of a Geometrical Figure. Our ideas of distance are founded largely on vari ation in size of the retinal image, and on muscular sensation. The artist, when sketching a scene wherein are many objects of the same size at various distances, puts them of different sizes in his sketch, to give proper perspective in the finished sketch. An artist in painting a picture can give the impression of nearness or dis tance by means of different colors, to give the impres sion of nearness he uses a fair proportion of warm red in the foreground, and uses a cold misty blue in the back. It was Prof. S. P. Thompson, who first came to the conclusion that the chromatic aberration of the