Even if it's a render, it's probably just 3d capture played back. You can see how unrealistic the young Keanu is versus the current one. The jaw specially moves in a weirdly inhuman way both in game play and in intro when he suddenly shape shifts.
This article is also speculation and I don't believe them. If it was all a render, all faces should have maintained the same detail and realism. But only Keanu's face is real enough. You can even see his individual hair which are out of shape. That's way too real. Those hair can't possibly be 3d captured like that.
As someone else pointed out, he does change to 3d render at 1:39 in a far view and you can easily see how unrealistic that one is.
This article is also speculation and I don't believe them. If it was all a render, all faces should have maintained the same detail and realism. But only Keanu's face is real enough. You can even see his individual hair which are out of shape. That's way too real. Those hair can't possibly be 3d captured like that.
As someone else pointed out, he does change to 3d render at 1:39 in a far view and you can easily see how unrealistic that one is.