fxg: One of the key shots is the fly walking over Walt’s glasses? Can you talk about that?
Beck: That is actually my favourite shot, where you see Walt’s eye in extreme close focus, looking very distressed and moving around to the sound of what is obviously a fly in the room and then it lands right in front of him – on his glasses. As he focuses onto the fly, we pull back into focus from his eye onto the fly. This was always designed to be a CG fly. We had a few tracking dots on the glasses. If you look at the original plate it plays beautifully, except that there are six little dots on the glasses where the feet are to go and no fly. We had lots of lighting reference for that. The sound department did such a good job for that shot too, because if you listen carefully you can hear the sound of him rubbing his little legs together. Another challenge with the animation was that flies do a pretty good job of flying but they kind of crash-land a lot of the time. So we’d have to add a little bit of movement after the landing.
– from Breaking Bad : Entity FX (interview with Mat Beck, senior visual effects supervisor)