PhyGDPO: Physics-Aware Groupwise Direct Preference Optimization for Physically Consistent Text-to-Video Generation

(a1) A player rides their horse, preparing to strike the ball, their mallet poised.

(Hint: Previouse methods all fail to generate the striking interaction between the mallet and the ball)

(a2) A soccer player runs, plants their foot, and drop kicks a soccer ball high into the air, the ball arcing visibly.

(a3) A gymnast drops from the parallel bars and lands safely on the mat below.

(a4) A gymnast performs a transition from a front support to a back support on the pommel horse.

(a5) A player dunks the basketball, the basketball soaring upward before slamming through the net.

(a6) A person wearing a helmet performs a handspring over a platform.

(a7) A person plays squash on an indoor court.

(a8) A gymnast stands on a balance beam, then performs a forward roll, landing smoothly.

(a9) A wooden pencil is carefully dipped into a glass of crystal-clear water, showing the intriguing visual shifts and reflections caused by the interaction between the pencil and the liquid.

(Hint: The curved cup wall together with the water forms a convex-lens-like structure that produces a magnifying effect, and the water surface also introduces refraction. However, previous methods all fail in generating such complex physical phenomena.)

(a10) A small burning ball of paper was thrown into a pile of dry paper.

(Hint: In Sora2’s generated videos, the burning ball fails to ignite the surrounding dry paper. In Veo3.1’s generated video, the burning ball exhibits an unrealistic violent explosion, producing scattered sparks.)

(a11) A golfer addresses the ball, takes a backswing, and hits the ball, sending it arcing high into the air.

(a12) A metal pipe smashes a pumpkin, causing its insides to spill out.

(a13) A baseball bat smashes a glass bottle, sending shards flying in all directions.

(a14) A timelapse captures the transformation as fog in a mountainous region comes into contact with a cold car windshield.

(a15) A volleyball player takes a hard swing, the ball contacting the palm and fingers, followed by a rapid downward motion sending the ball over the net.

(a16) A surfer dives underwater to avoid a breaking wave, resurfacing seconds later.

A weightlifter completes a snatch with a 25kg barbell, holding it momentarily overhead.

A tennis ball is gently placed on the surface of a bucket filled with water.

A person shovels snow from a garden path, leaving a clear path.