[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