For beginners retopologizing an armature 3D model, start with the armature in a neutral pose (e.g., T-pose), trace low-poly quads along deformation lines (joints), snap to the high-poly surface, and test for stretching.
- **Neutral Pose**: Keep the armature in a rest position (like T-pose) so topology aligns with natural movement—avoids awkward deformation later. - **Trace Quads**: Use tools (e.g., Blender’s Retopology tool) to draw four-sided polygons along joints (elbows, shoulders). Quads deform smoothly with armatures, critical for animation. - **Snap to High-Poly**: Apply a Shrinkwrap modifier (in Blender) to attach your new mesh to the original—retains shape without losing detail. - **Test & Practice**: Move the armature to check for stretching. Try Blender’s "Retopoflow" add-on for guided tracing, and start with simple armatures (e.g., a cylinder with two bones) to build skill.