What is when does the animation in one piece change?

The animation in One Piece changes at various points throughout the series. These changes are known as "arc refreshes" and are usually done to give the animation a new look and feel to match the tone of the storyline.

Some notable examples of when the animation in One Piece changed include:

• Episode 144: This episode marked the beginning of the Water 7 arc and a major shift in animation style. The characters' designs became more streamlined and the colors brighter and more vibrant.

• Episode 517: This episode marked the beginning of the Fishman Island arc and another change in animation style. The colors became more muted and the shading more refined, giving the series a more polished look.

• Episode 629: This episode marked the beginning of the Dressrosa arc and a major overhaul in animation quality. The characters' designs became more detailed and the animation smoother, with a greater focus on dynamic camera angles and fluid action sequences.

Overall, the animation in One Piece has undergone several changes throughout its run, with each arc refresh giving the show a new look and feel to match the story being told.