Nice work with these @jeewon ,
With Ben Stiller the trick is to bring the light close to the face to brighten the face without brightening the whole scene.
Nice job with Christoph Waltz. Its difficult with this type of outdoor shot , a lot of the light will come from reflective sheets or cards out of shot rather than lights, making it hard to replicate the soft light with lights. Notice the blending of the shadow line compared to your image the shadow line is hardly visible.
John Wick looks pretty good, the exercise is about the lighting, so don’t worry too much about the shiny face. I would suggest the blue light is slightly in front and to the side while the other reddish light is slightly behind and to the opposite side.
Us, yeah good likeness, maybe bring the light forward a touch so the shadow from the nose doesn’t reach the mouth, but then the nose is bigger than the reference.
Modelling from Moa Alfredsson, I think for this one the main light is more to the far side of the head further away, not so bright, a fill light on the nearside to the front of the face, and your missing a bright rim light behind the subject from the camera angle.
Hope this helps, Good job overall.
