Digital Domain dragon rig from Percy Jackson

-- Unfortunately this video was removed --
-- here is link to FX Guide article --

And this is another presentation from Siggraph 2010. Digital Domain explains how they rigged Hydra, a big multi-head dragon for a sequence in Percy Jackson. They go quite into details about making controls, swapping the heads, facial rigging, neck deformation and finish with explaining how they mapped high detail displacement flexing muscles on the sliding skin. Very interesting especially if your job is building character setups.