Visible scratches or stains.Faded or pale paint.Irregular or faulty brushstrokes.Uneven color distribution or mixtures.Perspective errors or geometric distortions.Anatomical inaccuracies or inconsistent body proportions.Insufficient detailing or a sense of incompleteness.Incompatible color palette or unbalanced use of colors.Weak or unbalanced composition.Inadequate shading or lighting effects.