we filmed ralph fiennes in all the action sequences and drama just normally.n the computer afterwards and after we track the movement with the computer we replace it with our snape nose. there are moments we flare the nostrils to emphasize the points he's speaking or talking and animation and it has to be textured to look like it was his real skin. that's done through a lot of reference photos we ache take for every set we film and use those to help lighten the skin. >> another one of burke's favorite effects, the monster book of monsters from "harry potter and the prisoner of azkaban." >> this was done with a practical animated prop. the idea is it's got these teeth here. you can actually see it. snap and try and get harry and the great scene where the book is trying to get him. we have an animated book and practical book we used on set and we animate all these little tentacles as well. we could film that on the set with dan and a real animated book and times we replaced the book with a cg one. there have been thousands of computer animated effects. but he sa

. >>> plus -- we'll show you how ralph fiennes went from this to this.ext, daniel radcliffe reveals what happened on the last day of filming irngts kind of wept like a child. i lost it. >> when this "larry king" special, "harry potter: the final chapter" returns. [ male announcer ] 95% of all americans aren't getting enough whole grain. but actually, it's never been easier to get the whole grain you want from your favorite big g cereals. from cheerios to lucky charms, there's whole grain in every box. make sure to look for the white check. ♪ [ doug ] i got to figure this out. ♪ [ dr. ling ] i want to spend more time with my patients. [ jim ] i need to build a new app for the sales team in beijing. [ mrs. davis ] i need to make science as exciting as a video game. ♪ [ jim ] i need to push out a software upgrade. [ dr. ling ] review ms. cooper's history. [ doug ] i need to cut i.t. costs. [ mrs. davis ] i need to find a way to break through. [ jim ] i need to see my family while they're still awake. [ dr. ling ] see if the blood work is ready. [ doug ] i n

. >>> plus -- we'll show you how ralph fiennes went from this to this. next, daniel radcliffe reveals what happened on the last day of filming irngts kind of wept like a child. i lost it. >> when this "larry king" special, "harry potter: the final chapter" returns. ♪ hey, dad, you think i could drive? i'll tell you what -- when we stop to fill it up. ♪ ♪ [ son ] you realize, it's gotta run out sometime. [ male announcer ] jetta tdi clean diesel. the turbo that gets 42 miles per gallon. ♪ >> larry: ten years ago it was the million dollar question. who would play harry potter? producers set out to find the perfect boy. >> great. it was a very difficult process. finding harry was very hard. it was like trying to find -- i think everyone was getting slightly desperate and i was walking down the streets of edinboro looking at them in a suspicious way. could it be them? and they walked into the theater and they found dan. dan is an actor. he's just perfect. >> dan, of course, is daniel radclif radcliffe. up to then, hig biggest role in the biggest miniseries "

>> larry: and where ralph fiennes transforms into voldemort. of this exclusive footage in just a moment. >> it's a really interesting -- there's an awful lot of very complex challenges in the potter books, and j.k. rowlings writing is great and she gives a lot of good description. writing it down on the page and translating that into a moving image is difficult because everybody has an idea when they read the book of what something might look like. >> larry: tim burke has been the visual effects supervisor on the harry potter films for the past eight years. his job, trying to make everything that happens at hogwart's look real. >> i think visual effects in harry potter go hand in hand, and you can't make the films without them. >> larry: burke leads a team of hundreds of wizards who make movie magic on the big screen. >> i don't think the audience would realize quite how many effects there are in the films. especially down to the environment. it's quite startling when we show people what was actually shot with an actor in front of a green scree

win them all. >> one of the most important transformations tim and his team have done, turning ralph fiennesdark voldemort, seen for the first time, we were able to show you how it was done. >> the face is something we finessed the technique over the years and, basically, ralph wears prosthetic matrix and a number of dots we cover the area and have to replace with a digital prosthetic. we films him in all the action sequences and drama just normally. and removed his real nose in the computer afterwards and after we track it with the computer we track it with the computer we replace it with the cg snake nose. there are moments we flare the nostrils to emphasize the points he's speaking or talking and animation goes into that as well. it has to be texted to look like it was his real skin. that's done through a lot of reference photos we ache take for every set we film and use those to help lighten the skin. >> another one of burke's favorite effects, the monster book of monsters from "harry potter and the prisoner of azkaban. >> this is a great sequence where the book actually comes alive. thi

, who is an amazing actor in this film, also emma and ron, one of my favorite actors actually, ralph fiennesrobably one of my favorites even though i was rooting for harry. >> did you read the book? >> i actually did not read any of the books. i was an easy critic. i gave the film 5 stars. >> okay.y. >> but let's definitely take a listen to what some of the other fans had to say. >> i thought it was great. you know, it was a great ending. because it just -- everything was so big -- even bigger than in the book. so they just took everything and just ramped it up to like the full extreme. >> this is one of those few cases, and i usually love books more than i do movies, where i thought the movie was even better. >> my favorite character was dottie. >> it was everything i could have hoped for. literally like every page of the book on the screen. >> it's amazing to see how the kids have really just grown up into these amazing actors. >> the greatest people alive today acting are in it. so it's for the ages. that's an extra bonus. >> i would give the movie 5 stars. >> i have to agree with the kid