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This is a paid asset, but now you can download DestroyIt – Destruction System Free.
DestroyIt – Destruction System v1.12 (Latest version)
NEW! Version 1.10 now includes the ability to make destructible terrain trees! Use Unity’s terrain system to place trees, then make them fully destructible with DestroyIt.
NOTE: Due to changes to the prefab system in Unity 2018.3, DestroyIt 1.10 requires this version.
DestroyIt is a highly optimized destruction system that provides multiple options for handling the damage, repair, and destruction of objects in your games.
Objects can show visible progressive damage (which can even be repaired) using the Standard shader and customizable damage textures. You can also play damage effects at any damage level, for instance, an engine that starts smoking at half health and catches on fire at one-quarter health.
Destruction can be simple or realistic, from playing a particle effect to replacing the object with a pre-fractured prefab. You can even combine the two for a more extravagant effect.
DestroyIt is designed to handle mass destruction efficiently. The framework provides tools for limiting particle effects and debris when many objects are destroyed at once, or are farther away from the camera. Object pooling is also used to optimize memory allocation.
Everything in the demo scenes and screenshots is provided, as well as full C# source code and documentation to get you started.