The biggest feature of Peripheral drift illusion is that there are many dense color changes in one area. For example, you can find that the attached picture is full of red, green, black and white. Different colors have different luminance and contrast, in peripheral vision (peripheral vision is particularly sensitive to changes in light contrast), there will be temporal differences when processing information of different luminance, and it will activate the brain responsible for the motion system.Because the motion system is activated, a sense of dynamics is produced. So this sense of dynamics is only imposed on us by the brain, and it does not really exist.