Can't post them all, so here's the top 3
2019 First prize
Frank Force. "Dual Axis Illusion". USA
This spinning shape appears to defy logic by rotating around both the horizontal and vertical axis at the same time! To make things even more confusing, the direction of rotation is also ambiguous. Some visual cues in the video will help viewers change their perception.
2019 Second prize
Haruaki Fukuda. "Change the Color". University of Tokyo. Japan
In this illusion, either downward or rightward motion perception for the dots is possible. Depending on the perceived motion direction, color changes: red and green dots with downward motion, and yellow dots with rightward motion. This suggests that our perception of color is not simply the result of limitations in temporal resolution of the visual system.
2019 Third prize
Ryan E.B. Mruczek and Gideon Paul Caplovitz. "The Rotating Circles Illusion". College of the Holy Cross and University of Nevada Reno. USA
In the Rotating Circles illusion, the true motion of the central circle is unchanging – it simply rotates around a central point. However, the added motion of surrounding circles leads the perceived motion of the central circle to appear "pulled" and distorted. Even though it is continuously rotating, by fixating the white dot the central circle can appear to move up and down, left and right, even in a triangle. As with other dynamic illusions, the effect is strongest when viewed in the periphery. Viewers can confirm that the central circle is always rotating simply by looking right at it.
