Aug 27, 2025

Meet the Newest GenAI Tools: Environment Generation and Embodied LLM NPCs

Earlier this year, we announced the launch of non-embodied LLM NPCs and a preview of Environment Generation as part of Meta Horizon’s growing suite of GenAI creator tools.

Today, we’re excited to share that fully-embodied conversational LLM NPCs are right around the corner and Environment Generation is now available to all creators as part of the Worlds Desktop Editor.

Together, these tools will empower you to build worlds even faster and make them feel truly alive. While conversational LLM NPCs are coming soon, we want to give you a closer look at both tools so you can be prepared and get started quickly.

Let’s dive into what to expect with embodied NPCs and what you can achieve with Environment Generation—and if you haven’t already done so, make sure you download the Worlds Desktop Editor to start building with all the latest tools.

Enhance Storytelling with Conversational LLM NPCs

Earlier this year, we announced the launch of non-embodied NPCs. Today, we’re excited to share that LLM-powered NPCs that support dynamic conversations will be added to the Worlds Desktop Editor very soon. This new update will enable you to:

Make customizable NPCs that can engage in lifelike conversation by responding to player voice input.

Leverage our character building tools to specify scripted responses in combination with LLM responses.

Select voices from a voice library that can speak scripted and non-scripted dialogue.

Use your embodied NPCs in both VR and mobile worlds.

As part of this update, we’re also expanding the Character Builder tool with new features that you can use to define various characteristics for your NPCs, including your character’s name, story, personality, dialogue, and test their responses. Later this year we’ll also be adding functionality that enables your characters to feel even more authentic by leveraging AI to trigger in-world actions, dynamically converse with real players and more.

With the power to seamlessly integrate unique characters and captivating dialogue, you can elevate gameplay by offering players helpful context, witty banter, hints on where to explore and what actions to take, all while deepening the lore of your world.

To get a feel for what these NPCs can do, we recommend checking out worlds like Bobber Bay Fishing and Fin, the AI shopkeeper character who interacts with players throughout the game. Or, check out Profit or Perish, where you can see another example of an NPC making a world more engaging and fun via the game’s boss character.

Fast-Track Your World with Environment Generation

Environment Generation empowers you to build an entire themed environment with a simple text prompt to save significant time during early phases of the build process.

Currently, you can use this feature to generate a variety of landscapes using both granular parameters as well as LLM prompts to inform the overall theme of your creation. These tools allow you to quickly generate and kitbash, providing flexibility for your preferred workflow. Each themed environment comes loaded with:

Rich detail and color

3D meshes

Textures

Decomposable assets for creative control

Learn more by visiting the documentation.

Use the Power of AI to Bring your Ideas to Life

With the launch of Environment Generation and the upcoming embodied NPCs, we’re excited to enhance what is already the most comprehensive and integrated set of GenAI creator tools available on the market. With the Worlds Desktop Editor, all of these tools are at your fingertips:

AI-Enabled Features Available Now	What It Is
Environment Generation	Quickly generate a themed environment for your world.
Creator Assistant	AI agent to partner on creation and orchestration of tooling and world building.
Style Reference	Easily generate, save, and reuse specific styles, ensuring consistent results across your creations.
Mesh Generation	AI-enabled 3D mesh generation
Texture Generation	Use AI to easily re-texture assets
Typescript Generation	Create typescript code using generative AI
Skybox Generation	Use AI to easily generate the sky for your world
SFX Audio Generation	AI-enabled sound effects generation
Ambient Audio Generation	AI-enabled ambient audio generation

We can’t wait to see how you leverage these new tools to build worlds that captivate players, spark imagination and bring people together. To stay up to date with the latest creator news and updates for Worlds, visit our weekly release notes and follow us on X and Facebook.

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