Dynamic Destructible Environments via Mesh Fragmentation

Act as a Lead VFX Programmer. Design a highly complex system for rendering real-time destructible environments within a WebGL context utilizing React Three Fiber and the Rapier physics engine. Explain the precise event-listener logic required to hot-swap a massive, static monolithic mesh for a pre-calculated collection of fractured `RigidBody` fragments the exact millisecond a collision impact exceeds the mathematical [IMPACT_THRESHOLD]. Discuss the integration of a [SHATTER_ALGORITHM] (e.g., Voronoi/Delaunay cell fracturing in Blender) to generate the shards. You must engineer a rigid cleanup protocol managing the [DEBRIS_LIFESPAN], dictating exactly how and when to fade out and programmatically dispose of hundreds of tiny physics bodies from the Rapier world to prevent a catastrophic memory leak.