How to fix distorted in 3D mesh 3D models?

To fix distorted 3D mesh models, first identify the cause (e.g., overlapping vertices, non-manifold edges, stretched triangles, flipped normals) then use software tools to address each issue. Common fixes include: - Welding overlapping vertices to remove duplicates. - Deleting non-manifold edges (edges with too many connected faces) to fix topology errors. - Remeshing stretched areas to rebuild uniform, balanced faces. - Recalculating normals to correct inside-out or misoriented faces. Beginners can use free tools like Blender—its Edit Mode has built-in checks (e.g., “Select Non-Manifold”) and one-click fixes (e.g., “Recalculate Normals”). Always save a backup before editing to avoid losing work.