What exactly do you mean by VFX? I assume blue and greenscreen work. I have pulled a thousand keys. It all depends (mostly) on the lighting. I have an HPX170 but have not done any screens yet with my camera but I have seen my co workers use the HVX to much success. (Music vids, mini series, John Adams) I have every confidence that it can do a great job if lit well. I have worked on multi million dollar jobs (shot with the best cameras) that were lit poorly and required full rotoscoping. LOL. (Not)