Bring characters to life with dynamic, modular hit reactions! Procedural, customizable, lightweight — perfect for any game needing responsive impact effects. No code or extra rigs needed!
Procedural Hit Reactions System v1.1.0 (13 May 2025)
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Description
Breathe life into your characters with Procedural Hit Reactions – a modular, lightweight, and powerful system for dynamic, physical hit responses!
No need for countless animations or complicated setups — whether you’re making shooters, action RPGs, VR games, or anything in between, this asset gives you smooth, believable hit reactions with minimal effort.
This system is actively updated and evolving — many more features and improvements are on the way!
???? Key Features
Bone-Specific Reactions: Easily attach reactions to any bone or body part — head, chest, arms, even props.
Customizable Reaction Profiles: Use simple ScriptableObjects to define reaction strength, rotation, translation, blend curves, and timing.
Directional Awareness: Make impacts feel real by reacting to incoming bullet vectors or contact points.
Additive or Override Modes: Blend reactions into your existing Animator-driven motions — or skip animations entirely and apply procedural motion directly to Transforms.
Advanced Blending Controls: Fine-tune blend-in/out speeds, simulate heavy impacts with Slow Blend Mode, or carry over previous reactions for ultra-smooth realism.
Follow-Through Effects: Make connected bones (hair, weapons, gear) naturally trail behind the main impact motion.
Plug-and-Play Projectile Integration: Easily add our included HitReactionTrigger script to any projectile, melee weapon, or explosion — and automatically trigger hit reactions on collision. Supports both Rigidbody-based and Transform-based projectiles!
Minimal Setup, Maximum Power: No runtime rig rebuilds. No heavy Animator constraints. Just plug, configure, and react!
Full Flexibility: Works with animated characters (Animator) or static objects — all handled procedurally through Transform overrides when needed.
???? Perfect For
Third-Person Shooters
First-Person Games
Melee Combat Systems
Projectile Impact Reactions ( Arrows, bullets etc. )
VR / AR Interactions
Explosions, impacts, and environmental destruction
Any project needing dynamic impact feedback
???? Why Choose Procedural Hit Reactions?
✅ Ultra-lightweight and optimized for runtime performance
✅ Fully modular — easy to customize or extend
✅ Works alongside Unity Animator or entirely Transform-driven
✅ Minimal setup time: Get up and running in minutes
✅ Clean, readable full C# source code included
✅ Full documentation, tutorials, and active Discord support
✅ Actively updated — with even more improvements coming!
???? Bonus
Ready-to-go projectile and character demo scenes included
Full C# source code included
Supports Unity Animator layers (for clean blending)
Free future updates
Bring dynamic, believable hit reactions to your gameobjects today!
Feel the impact — procedurally.
✨ Links
???? Full Documentation and Tutorials
???? Join Our Discord for Support and News
Changelog
Version 1.1 — May 2025
• ReactionProfile Overhaul: Moved all per-hit options (timing, blend behaviour, hit acceptance, axis-locks) from BodyPartReactor into ReactionProfile
•FollowObjects System: Replaced legacy followTransforms with List<FollowObject> to allow per-object rot/pos weights
• Inspector Enhancements: Migrate Legacy Settings button to convert v1.0 reactor fields into a new profile asset
• Create New Profile button under the Profile header
• Migration Utility: Automatically duplicates and renames profiles when legacy values differ, preserving existing setups
• Added UnityPackages for each render pipeline (builtin,urp,hdrp) so the demo
is playable on any render pipeline.
Version 1.0 — Initial Release
Core procedural hit-reaction system
Basic BodyPartReactor + HitReactionController
HitReactionTrigger for auto-routing projectile impacts
Sample FPSController and demo scene included
Technical details
Tested on unity versions: 2021,2022,2023, unity 6
