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. 2000 Oct 10;97(21):11667–11672. doi: 10.1073/pnas.97.21.11667

Figure 1.

Figure 1

Tilt illusions. (a) Fraser illusion: the carrier is tilted by 5° to the envelope orientation. (b) Phase illusion: successive patches are shifted in phase by ¼ cycle. (c) Tilted-chain illusion: patches are tilted by 6° to the row orientation, such that successive patches are shifted by ½ cycle along the carrier. Two new orientations emerge.