How do you ensure good edge loops for animation in 3D models?

To ensure good edge loops for animation in 3D models, focus on aligning edge flow with natural movement paths and maintaining consistent polygon density. - Align with movement: Edge loops should follow the direction of muscle contraction, joint rotation, and skin movement (e.g., around elbows, knees, or facial features) to enable smooth mesh deformation without pinching or stretching. - Maintain even density: Avoid abrupt changes in edge direction or uneven polygon distribution, as these cause unnatural deformations. Practical testing helps: temporarily rig simple joints and bend them to verify edge loops deform naturally, adjusting as needed.