- Identity drift
- The restored face no longer matches the person in the input—for example, age, expression, eye shape, or jawline changes. Compare the result with the source before printing or sharing.
- Damage repair
- The extent to which scratches, tears, stains, and fading are reduced. Content added to a missing area is a plausible reconstruction, not recovered evidence.
- Texture preservation
- Whether useful paper or film texture remains without turning skin into an unnaturally smooth surface.
- Unwanted colorization
- Whether restore-only adds color that was not requested. Colorize mode is an interpretation, not proof of the original dyes or scene colors.
- Artifacts
- Warping, double edges, mushy regions, color bleed, seam lines at fill boundaries.