Unrealistic proportions, awkward pose, lack of detail, flat appearance, unconvincing lighting, off-balance composition, stiff execution, poor draft quality, weak contrast, unfinished look, blurry features, unnatural color palette, inconsistent lighting, distorted face, overexposed highlights, underexposed shadows, cluttered composition, disjointed elements, unnatural postures, exaggerated features, overdone effects, mismatched textures, stiff brushwork, unrealistic shadows, unrealistic highlights, distorted anatomy, uncoordinated color palette, unnatural lighting., ugly, deformed, noisy, blurry, distorted, grainy