A Peak Inside the Motion Capture VFX for Welcome to Marwen
The work done on Welcome to Marwen is truly brilliant!
"Although those dolls come to life as cg figurines, they were not completely digital creations. Director Robert Zemeckis, was adamant that the dolls – and particularly their faces – be realized in a more life-like manner and one that didn’t involve the lengthy process of translating facial capture into a final performance" explains Ian Failes in an article for Cartoon Brew.
Take a look at this video to see how they gave the dolls lifelike appearances.