I don't think there's anything wrong with how he looks but the subtle over-fluidity of his movement. It's especially bad in the first shot when he's just swaying around most unnaturally. He's completely out of focus so there's nothing the rendering is doing wrong but the motion immediately alerts the brain that this isn't real.
https://www.youtube.com/watch?v=Ib2v8atzt5c
I don't think there's anything wrong with how he looks but the subtle over-fluidity of his movement. It's especially bad in the first shot when he's just swaying around most unnaturally. He's completely out of focus so there's nothing the rendering is doing wrong but the motion immediately alerts the brain that this isn't real.