Question for Clip Studio Paint people, how did you approach this one? The Photoshop clone source that Marc demonstrated in the video wasn't there, or at least wasn't there in the same way/a way I could make out, so I jury-rigged it with superimposed layers to get the sizes about right.
You can see some awkwardness (lighting angles were particularly different in the eyes between pics, leading to a bit of a Two-Face effect, older Harrison Ford's nose was at an angle the young one's wasn't), might try this again after the face liquify assignment but it went better than it could have.