Massive Software [L1 ] is a company who develop crowd-simulation tool and AI-based 3D animation system. This company received a Scientific and Engineering Academy Award for its work on The Lord of the Rings trilogy. Its flagship product (Massive) supports Tcl for automating repetitive tasks (see API item in features list [L2 ]).
(Last link is dead, alas. But there is a mention of Tcl here )