Most over-edited photos aren't ruined by one big mistake — they're given away by a handful of small, specific tells. Once you know what to look for, they're easy to spot, and easy to avoid.
Plastic skin
The most common one. Pushing skin-smoothing or noise reduction too far removes pores and fine texture along with actual blemishes, leaving skin that looks like it's made of wax or plastic rather than a photograph of a person. Real skin has texture even when it's clear and healthy. The fix isn't "less smoothing" everywhere — it's smoothing selectively, on actual blemishes and unevenness, while leaving natural texture in the surrounding skin intact.
Halos around edges
Oversharpening creates a light or dark outline that hugs the edge of an object — most visible around hair against a bright sky, or the edge of a subject against a contrasting background. This happens because sharpening works by increasing contrast right at edges, and pushed too far, that contrast boost becomes a visible ring instead of a subtle edge enhancement. It's one of the fastest ways to make an otherwise good edit look amateur.
Mismatched lighting on composited elements
When an object, person, or background element is added or moved within a photo, the biggest giveaway is lighting that doesn't match — a shadow falling the wrong direction, a subject that's lit flatly while the background has strong directional light, or skin tones that are slightly too cool or warm compared to everything else in the frame. The eye is extremely sensitive to lighting inconsistency even when it can't articulate what's wrong.