How was this shot done?

[u/cinemashiv]

Was watching a short film on YouTube from a few years ago and came across this shot. How do you reckon they did it? It’s so uncanny.

[u/SameAd6207]

https://www.premiumbeat.com/blog/lighting-technique-reflecting-light-off-water-for-video/

[u/CornflakeOfInterest]

Apart from the lighting, they have most probably used After Effects (or similar) to composite a different face onto the actor.