From: The World In Your Head by Steven Lehar

Fig. 9.2 (A through C) Several possible completion percepts for the amodal completion shown in Fig. 9.1B. (D) A spatial probability field that represents a probabilistic superposition of all possible completion paths of the amodal percept of Fig. 9.1B, with a higher density (darker shade) along lines where many of the possible completion paths coincide.