Scenario for Blender README

Scenario for Blender

Experimental. Bring Scenario image, video, 3D, PBR material, audio and 360 environment generation into Blender. Use scene captures and selected meshes as inputs, explore camera moves, and turn a written scene description into a greybox layout with Blockout. A compact composer, sidebar, expanded Studio view and local MCP server provide access from your scene. This is a Python extension with pinned SDK dependency wheels, licensed GPL-3.0-or-later. Read the known limitations before relying on a workflow.

The Scenario sidebar with all creation tabs and a clearly labelled offline Image example

Requirements

Blender 5.0 or later, as declared in the extension manifest.
A Scenario account with API access, an API key and its secret. See Obtain your API key and Scenario help for current account requirements.
An internet connection and Blender's Allow Online Access setting enabled under Edit > Preferences > System > Network before contacting Scenario.
Scenario generations and prompt helpers consume Creative Units (CU). Review the displayed estimate before Generate; models, parameters and references affect the cost. See costs and the limitations above.

Install

Install from the official extension repository so that Blender can offer updates:

Turn on Allow Online Access under Edit > Preferences > System > Network.
Open Edit > Preferences > Get Extensions > Repositories, choose Add Remote Repository and enter https://blender.scenario.com/repo/index.json.
Find Scenario in Get Extensions and install it. It appears as "Scenario" in Blender's Add-ons list.
In Scenario, open Organization settings > API Keys > Add API Key and follow the instructions to obtain the key and secret.
Open Edit > Preferences > Add-ons > Scenario. Leave Credentials set to Saved in Blender, paste the key and secret, then press Test connection. Choose an Output Folder for generated files.

To install from a ZIP instead, download scenario-<version>.zip from the releases page and keep it zipped. Verify your download: for releases that include SHA256SUMS, save the ZIP, scenario-handbook-<version>.html and SHA256SUMS together, check them with sha256sum -c SHA256SUMS (macOS: shasum -a 256 -c SHA256SUMS) and, with the GitHub CLI, run gh attestation verify scenario-<version>.zip -R scenario-labs/blender-plugin (details). Historical v* releases have neither. Drag the ZIP onto a Blender window, or use Edit > Preferences > Get Extensions > Install from Disk, then continue with step 4. A ZIP copy does not update itself; see Updates.

Updates

A copy installed from the official repository updates through Blender. Open Preferences > Add-ons > Scenario > Updates for update checks and Blender's native Get Extensions manager. Enable Allow Online Access before checking. Updates are installed only when you choose them in Blender. The repository offers releases from 0.10.0 on.

A ZIP copy lives in Blender's local repository and does not update itself. Keep updating it with Install from Disk, followed by a restart, or switch to the repository: uninstall the ZIP copy first, install Scenario from the repository, then enter your key and secret again. Uninstalling deletes the ZIP copy's storage, including its stored jobs and the media that the video, sound and Film review strips Scenario added play from; past generations remain available under Project history (cloud) in Generations. Never keep both copies installed. Read Switch from a ZIP to the repository before switching, and the update guide for compatibility and manual fallback.

Why not extensions.blender.org

The Blender Extensions terms restrict extensions whose functionality depends on external registration, keys or payments, including access to external services. Scenario requires an account and API credentials, so this extension is distributed through its own repository at https://blender.scenario.com/repo/index.json, with each release's ZIP also attached to its GitHub release. Its manifest declares the permissions it uses and their reasons.

Quick start

In the 3D viewport, press N and open Scenario, or use the Scenario button in the viewport header. Pick a lane and model, enter a prompt, add any required reference and inspect the estimate before Generate. Results appear in Generations and your Output Folder, with actions for viewing or importing supported media. The user guide describes each lane and its controls.

To rate the extension or tell Scenario what to improve, use the heart in the Scenario panel or Feedback in Studio. Share anonymous usage data, in the extension's preferences, stays off unless you turn it on.

Features

Image: generate from text or reference images and use results as textures or references.
Video: generate from prompts, images or scene playblasts.
3D: generate meshes, run provider edit tasks on a selected mesh and apply a saved edit back to it.
Materials: generate saved PBR texture sets and apply them explicitly to a chosen mesh material slot.
Audio: generate speech, music or sound effects and add results to the sequencer.
Render Image: use a scene capture and look references to produce a still.
Render Video: work with timeline captures, a camera path planner and style references.
Blockout: turn a scene description into a greybox layout, then refine or rebuild it.
Environment: generate 360 panoramas, HDRIs and upscales, then apply them to the scene World.

Agents (MCP)

The local scenario-blender server connects an authorized agent to the open scene and generation into it. The hosted mcp.scenario.com server provides platform-wide collections, training, workflows and usage without requiring Blender; connect both when needed.

The default local endpoint is http://127.0.0.1:9876/mcp. Agents (MCP) shows its status, and its Connect buttons add it as scenario-blender to Claude Code, Codex, Cursor or Claude Desktop. It needs no credential, so any program on this computer can connect. Connected agents can read the scene and request paid work; arbitrary Python execution is a separate opt-in permission, disabled by default.

Use the MCP reference for complete client setup, tool contracts, security controls and headless configuration. The headless entry point is:

blender --background scene.blend --command scenario_blender

Authentication

Scenario API requests use an API key and secret. Saved Blender credentials are the default; Credentials > Environment explicitly selects an environment pair instead. The extension does not provide browser OAuth sign-in. The hosted Scenario MCP service has its own authentication, described in its linked docs. Blender stores saved credentials in its preferences, not an OS keychain.

What leaves your machine

Cost previews send prompts and parameters to https://api.cloud.scenario.com while you edit, before Generate. Upload reference sends files, scene captures or exported meshes; generation and prompt tools spend credits. Catalogs, thumbnails and result previews load from Scenario; cloud history and Library assets load when requested. Anonymous usage data, off by default, and feedback you send go to blender.scenario.com. Saved keys, prompts, job state and media remain in Blender preferences, extension storage or output files. Connected local agents can read your scene and request paid work using your account. Read Privacy and data handling for destinations, storage, clipboard use and current limits.

Documentation

Start with the user guide, known limitations and changelog. The documentation index links architecture, integration status and developer references. The public HTML handbook address is blender.scenario.com. Build HTML from the maintained Markdown with make docs; see documentation builds for website and single-file outputs.

Staying up to date

Follow releases, or choose Watch > Custom > Releases on GitHub for release notifications.

Support

Use Support for bug reports, feature requests and the information to include. Account, billing and API-key questions go to support@scenario.com or Scenario's in-app support. Never post credentials or signed asset URLs in a public issue.

Report vulnerabilities privately through Security > Report a vulnerability or the contact in Security; do not open a public issue.

Development

Read Contributing for the pinned environment, local checks, portable tools and isolated Blender test loop. AGENTS.md is the canonical conventions contract for humans and agents; agent tools describes the shared commands. Follow the Code of Conduct. Optional local hooks are installed with make hooks; see installation and scope. Offline tests need no Scenario account. Live smoke tests spend credits and require explicit authorization; they are outside the default checks.

Discover repository maintenance commands with uv run --locked --no-env-file python -m tools --help from the repository root. The assets check and assets optimize commands share the documentation image policy with the unit suite.

Native CI covers Blender 5.0.1, 5.1.2 and 5.2.2 on Linux and Windows for pull requests. A separate informational workflow schedules Blender 5.1.2 checks on macOS Apple silicon and Windows x64 weekly; see matrix maintenance for failure tracking.

Sibling integrations

Scenario for Blender is one of several Scenario integrations. The plugins share the Scenario name, the id scenario inside each host's namespace and the support channel (support@scenario.com), not necessarily the same licence.

Scenario for Unity, Unity package com.scenarioinc.scenario. Scenario for Unity is MIT-licensed; this extension is GPL-3.0-or-later because Blender add-ons that import bpy must be GPL-compatible.
Scenario skills for agents (MIT).
The Scenario MCP server provides Scenario tools outside Blender. The MCP guide explains how it relates to this extension's local server.

Licence

Copyright 2026 Scenario Inc. First-party extension code is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. It is distributed WITHOUT ANY WARRANTY; see LICENSE for the full text. First-party source headers and the extension manifest declare GPL-3.0-or-later, and the extension ZIP includes the same GPL text. Bundled dependencies, adopted sources and assets retain their original licences and notices; see the SDK bundle and source adoption. The bundled icon notice records the generator, the font option and the icons' first-party design origin. Scenario Inc. made the exploration gallery covers (docs/images/exploration-*.png) and also publishes them at www.scenario.com/explorations.

Blender's licence guidance requires a GPL-compatible licence for published add-ons using its Python API. The Blender Extensions Platform requires GPL-3.0-or-later for add-ons it hosts. This project distributes outside that platform and uses GPL-3.0-or-later for its first-party extension code.

The GPL grants no trademark rights: "Scenario" and the Scenario logo belong to Scenario Inc., and Blender is a registered trademark of the Blender Foundation; this extension is not affiliated with or endorsed by the Blender Foundation. See TRADEMARKS.md.

Acknowledgements

The local MCP design acknowledges Blender Lab's blender_mcp project (GPL-3.0-or-later, Blender Authors) as a design reference. Its project page describes the upstream implementation, which uses a separate stdio MCP server and TCP connection to its Blender add-on. This extension implements loopback HTTP, main-thread tool dispatch and an opt-in Python gate.

The SPZ reader reads Niantic's SPZ Gaussian splat format. The MCP protocol module supports protocol revisions 2025-06-18, 2025-03-26 and 2024-11-05.