Horror Environment - NPC Dialogue System & Spooky VFX

MetaMix3D AI NPC Dialogue System for Horror Environment & Spooky VFX

Build interactive NPCs that players can actually talk to, without building the dialogue system and environment from scratch.

This package combines the MetaMix3D AI NPC Dialogue System + World Knowledge with a modular URP Horror Environment, giving you a ready-to-customize foundation for horror, mystery, survival, and story-driven games.

Drag and drop NPC prefabs into your Unity scene, connect dialogue data, and start testing NPC conversations quickly.

Check Documentation Setup Guides: Wiki Tutorial

Check Video Tutorial in Details: Video Tutorial

WHAT THIS PACKAGE INCLUDES

• AI NPC Dialogue System
• World Knowledge System
• JSON-based offline dialogue support
• Plug-and-play Unity setup
• NPC prefab workflow
• Dialogue UI / chat component
• Example dialogue files
• Sample NPC prefabs
• Modular Horror Environment
• Demo scene
• Documentation

MAIN FEATURES

Plug-and-play setup

Add an NPC prefab to your scene, assign dialogue data, and test conversations inside Unity.

JSON-based offline dialogue

Use local JSON files to define dialogue content and response flow for offline mode. No internet required.

World knowledge support

NPCs can answer questions related to game locations, lore, and environment-specific knowledge.

Horror environment included

Modular horror assets including houses, walls, props, lighting, VFX, and skybox ready to use as a demo or as a starting point for your own project.

Unity integration

Simple inspector workflow for assigning NPC dialogue, chat UI, and interaction settings.

Flexible workflow

Supports both:

•  Offline local dialogue mode
•  Extended AI-based workflow when connected to your external backend

EXAMPLE USE CASES

This package is suitable for:

•  RPG games
•  Adventure games
•  Story-driven games
•  Open world projects
•  Fantasy NPC systems
•  Sci-fi NPC systems
•  Dialogue-driven gameplay

WHY USE THIS PACKAGE?

Instead of manually building NPC conversation logic, chat UI, prefab setup, JSON dialogue loading, and game-side interaction handling, this package gives you a working starting point that can be customized for your project.

It is made for developers who want faster implementation and a clearer workflow for interactive NPCs.

PACKAGE CONTENTS

NPC Dialogue System:

•  6+ NPC / system prefabs
•  AINPCChat, DialogueManager, NPCInteractionTrigger, NPCChatUI components
•  JSON dialogue loader
•  World knowledge system
•  Proximity-based interaction
•  Inspector-based configuration
•  Runtime dialogue interaction logic
•  Offline mode (no internet required)
•  Optional cloud AI integration

Horror Environment (Supporting Demo Content):

•  46 PBR textures (2K / 1K)
•  14 prefabs + 1 terrain mesh
•  3 LOD levels on selected assets
•  UV mapped | PBR materials
•  Modular houses, walls, floors, roofs, doors, windows
•  Church assets, lamp posts, trees, fences
•  Horror-themed skybox, emission VFX, terrain mesh
•  URP + Built-in support

Sample Content (Demo Only – Not for Resale):

•  Example NPC prefabs
•  Example JSON dialogue files
•  Example world knowledge entries
•  Demo scene
•  Mixamo animations and rigs (demo only)

(Optional) AI Cloud Mode

This package includes an offline dialogue system using JSON files that works entirely inside Unity without any internet connection.

For developers who want more advanced AI-powered NPC conversations, the system can optionally connect to an external AI backend.

Online AI features may require:

•  API key configuration
•  Internet connection
•  Subscription or usage-based billing depending on the external service used

Offline mode works independently and does not require any external services.

More information about the cloud service can be found here:

Wiki/Cloud

Important setup notes:

•  After importing the package into a fresh project, TextMesh Pro Essential Resources may need to be imported from Window > TextMeshPro > Import TMP Essential Resources.
•  The included demo scene may use Unity Starter Assets / starter kit style character content for demonstration purposes only.
•  Sample Mixamo animations and rigs are included for demonstration purposes only. They are not part of the sellable core content. Users can download the original files for free from Mixamo's official website.

Known Issue:

Skybox materials use Built-in Procedural shader. They work correctly in URP but trigger an SRP compatibility warning in the Asset Store Validator. This does not affect functionality or performance. A URP-native skybox will be provided in a future update.

Support:

Email: [email protected]

Website: www.metamix3d.com