Low resolution
- Blurriness
- Pixelation
- Compression artifacts
- Noise and graininess
- Incorrect anatomy
- Incorrect proportions
- Extra or missing limbs
- Cropped body parts or tail
- Duplication and repetition of elements
- Oversaturated colors
- Poor lighting
- Overly exaggerated effects
- Visual distortions
- Double exposures
- Inappropriate content
- Watermarks
- Signatures
- Logos