yes, hazel. that's him, alright...
actually, bt uses kyma for a lot of his textural work (which are neither rhythmic or harmonic), also for the films he worked on, such as "fast and the furious" (the very first one, i think).
hazel (starfugger) uses cubase sx 2 or 3, i think.
kyma (kee-ma? not the rnb singer, the one who works in the 5th floor, haha) is by symbolicsound. and i think it's really geared towards serious sound design. i think bt turned to it when reaktor and/or opcode max just wouldn't cut it anymore. ...and to think i haven't even begun any serious tweaking with reaktor...
just like pro tools, it's powered by it's own hardware, although the interface is still controlled via a mac os or windows application. the interface (at least to me) resembles that of reaktor.
come to think of it, if you get the chance to listen to some of bt's work or even his sound libraries (both of which we have, haha), i think it's rather easy to imagine how the power of the tools he uses for his sound design could very well work in a flim post-prod setting.