[Source] RayFire Studios
Mir Vadim has posted work-in-progress videos showing features of the upcoming version of his RayFire Plugin, the Destruction and Fragmentation Plugin used on movies like Transformers 3, will integrate the Bullet Physics Library.
RayFire – Dynamic Feature
RayFire – Bullet Engine – 1700 Concave Objects
RayFire – Bullet Engine – Concave ProBoolean Fragmentation Type