Which revolutionary product design approach did Pixar introduce that changed visual storytelling in animated films?

Visual storytelling is a cornerstone of the film and television industry. From the early days of black and white silent films to today's CGI-rich productions, how studios present their visual narrative has dramatically evolved. This trivia question explores a significant shift in how major studios approached visual product design to enhance storytelling in the digital era.

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The RenderMan software that pioneered physically-based rendering for more realistic lighting and textures
The Multiplane Camera technique for creating depth in animated scenes
The Rotoscoping method where animators trace over live-action footage
The Stop Motion Animation system that photographed physical models frame-by-frame