Why some LED walls band on camera.
The eye averages light differently from a camera sensor. Refresh, scan, shutter, frame timing and exposure can turn a perfect-looking wall into a broken frame.
Test with the production camera and fastest shutter.
Distinguish refresh from frame rate.
Assign timing ownership across the signal chain.
01
The camera samples the scan
An LED wall updates rows in a sequence too fast for most people to perceive. A rolling-shutter camera reads its sensor in another sequence. When those timing systems intersect badly, dark bars or gradients appear.
A high quoted refresh rate reduces risk but does not prove every camera setting.
02
Exposure changes the evidence
Short shutters, high frame rates and unusual scan modes reveal problems hidden at normal exposure. Test the most demanding settings the production might use, including slow-motion and still photography if relevant.
03
Virtual production adds clocks
Genlock, processor latency, render cadence, frame remapping and tracking enter the system. One integrator needs responsibility for the photographed result, not only their individual component.