Figure 3.14 | An Example of a Subjective Contour | Does there appear to be a very bright triangle overlying three black circles and another triangle? This brighter-appearing triangle isn’t really there. It is a subjective contour created by your brain in its perception of the three black circles with a chunk missing (the three Pac Man–like characters). To demonstrate that this overlying brighter triangle is truly not there, cover up everything in the display but the horizontal blank center. When you do this, you will not see any difference in level of brightness across the horizontal center of the display. If the whiter triangle were really there, you would see differences in brightness.