Common mistakes when cleaning wall thickness in 3D models include over-thinning load-bearing areas, ignoring manufacturing minimum thickness rules, and missing mesh gaps or overlaps.
Over-thinning weakens the model’s structure, violating limits (like 1mm for FDM printing) causes fabrication failures, and gaps/overlaps create inconsistent thickness that disrupts functionality.
Beginners can use free tools like MeshMixer to visually check thickness—this helps catch issues early without extra cost.