I’m leaning more towards AI (or painting) than reality, but it’s not a confident lean.

The lighting looks pretty consistent except for that one guy fully shaded. It’s hard to tell the angles exactly, but it doesn’t seem like he should be completely in the shade given the apparent angle of the light and the angle of the side of the boat. But it’s hard to say for sure without knowing why the immediate foreground is in shadow.

Another clue is that only the guy in the front looks like his shorts are wet at all. They are pushing a boat out, so it would make sense that they would be mostly dry above the water as they go deeper, but it looks rough enough that I’d expect some parts above the water to look wet. Though the lighting makes it hard to say for sure just how wet or dry they are.

The oars don’t look right, but they also don’t look wrong enough for that to be a smoking gun.

It’s weird that they are all on the one side of the boat. You’d figure people launching a boat would push on both sides to spread out more.

It’s plausible either way but my gut says it’s not real.

Edit: removed a part because I was describing from memory and after another look, it doesn’t apply, but the positioning of the 3rd guy is weird, given the position of those behind him.