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Three modes are available:
- “No” disables the optimization process.
- “Curvature” is based on a mesh's curved areas and this mode tries to keep them while flat areas will be removed – at least partially.
- “Camera” analyses the mesh based on the polygons' distance to the scene's (animated) camera. Areas close to the camera will keep a high level of detail, and regions which are far away will be optimized.
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