It is slightly noticeable that before a scene with large use of visual effects, there is an insignificant image quality change (on 01:30).
If you look closely on the poster which hangs on the wall when The Director shows The Actor what body language to use you can notice a line between to shots merged into one (on 01:30).
One half of the screen appears out of focus revealing the visual effect (on 01:34).
The Director's hand disappears revealing the visual effect (on 01:57).
The Actor's sleeve partially disappears revealing the visual effect (on 02:03).