The people over at Prime Focus World who are responsible for the special effects and/or 3D conversion of films like ‘Total Recall’, ‘Harry Potter and the Deathly Hallows’, ‘Wrath of the Titans’ and ‘Tron’, have made four videos in which Jon Thum, visual effect supervisor, sits and explains the filming process and post for the slowmotion sequences for the movie, ‘Dredd 3D’. In the videos he explains how they transformed Johannesburg into the fictional Mega-City One, how they utilized Pre-viz for their pre-production and of course how they shot the incredible slowmotion sequences that really made the film interesting.