Why PLY 3D model is broken animation in file formats?

PLY 3D models often have broken animation because the PLY format is designed for static geometry (vertices, faces) and doesn’t natively support animation data like keyframes or rigs. Animation relies on storing dynamic, time-based changes—but PLY only focuses on static shape data. Non-standard workarounds for animation in PLY are rarely compatible with most software, leading to broken or missing animation. For functional animation, export your PLY geometry to formats like FBX or glTF (which support animation natively) and add animation there.