a bit more about it...
like you said, the "plastelina" films are made the same way - here in london both "corpse bride" and "wallace and gromit: the curse of the wererabbit" came out at the same week. both are stop-motion. the only difference is that "corpse bride" is puppets and "wallace and gromit" is 'plastelina' (both films, bytheway, also feature the voice of mrs burton aka helena bonham carter) i was watching an interview on tv with tim burton yesterday where he was talking about it. basically he drew the characters, some very talented animation people made the puppets, while the background (cities/houses/etc...) are all drawn. jessicarabbit explained the process of the shooting. on a GOOD day filming of stop-motion, you'll film no more than 6 SECONDS of the film! tim burton said on the interview sometimes they only filmed 6 SECONDS IN A WEEK! so, yes, it's a very long and tiring process. but it's worth it, and i guess that explains why all these films are so short! lol tim did mention several times that he despies CGI (computer animation) because it looks so fake, that's why he keeps using that old and beautiful stop-motion technique.