Spotting Inconsistent Lighting Direction Across A Scene
Launch library · evergreen read

Light in a genuine photo falls from a single consistent source, meaning shadows cast across every object within the frame should point in roughly the same direction throughout. When shadows within one single image point in noticeably different ways, that inconsistency is a meaningful sign of composition or deliberate editing having taken place.
This particular check requires a careful, deliberate look rather than a quick passing glance, since the mismatch involved is rarely dramatic or obvious. Comparing the shadow direction on the main subject against shadows visible in the background is usually the clearest and most reliable way to spot it, since the two should always line up.
As with other visual checks covered elsewhere, an inconsistency here is a prompt for further investigation rather than final, conclusive proof entirely on its own, since unusual but genuinely authentic lighting conditions do occasionally occur naturally in real, unedited photography without anyone tampering with the image at all.