Square USA used it to make the movie Final Fantasy.
Here's a paper they published on it: Gluing Things Together -
Scheme in the Real-time CG Content Production.
From that paper:
At SIGGRAPH 2000 and 2001, we, Square USA R&D team showed real-time rendering of scenes from full computer-generated movie ``Final Fantasy: The Spirits Within''.
[...]
We found it tremendous help to have an embedded Scheme interpreter in real-time rendering engine.
