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An open-source home design, floor plan and interior design editor written in Rust, built so that your AI can design with you. It ships with a Model Context Protocol server: Claude, ChatGPT, Codex, Gemini, Cursor or any other MCP client draws the walls, furnishes the rooms, builds the joinery, checks lighting and ergonomics against real standards and renders the photos, while every change shows up live on screen and is one Ctrl+Z away.

A Sweet Home 3D alternative for Windows, macOS, Linux and the browser, in English, Portuguese, Spanish and French.

Three ways to use it

The desktop app and the browser editor are free, open source and need no account. The hosted connector is free within a quota; see pricing.

Install

Windows — in PowerShell:

irm https://raw.githubusercontent.com/leandrodaf/3d-new-era-ai/main/scripts/install-windows.ps1 | iex

macOS (Apple Silicon and Intel) — in Terminal:

curl -fsSL https://raw.githubusercontent.com/leandrodaf/3d-new-era-ai/main/scripts/install-macos.sh | bash

or with Homebrew: brew install --cask leandrodaf/tap/3d-new-era-ai.

The installers work for your user only, with no administrator password: the app appears in the Start menu or Launchpad, newera goes on your PATH, the MCP server is registered in Claude Code and Codex if you have them, and running the same command again updates it. Uninstall with install-macos.sh --uninstall, or from Settings → Apps on Windows.

Prefer a plain download?

The builds are not signed with a paid Apple or Microsoft certificate, so the system asks once:

• Windows: unzip and open newera-gui.exe; if SmartScreen appears, click More info → Run anyway.
• macOS: unzip and move 3D New Era AI to Applications, then right-click it → Open → Open. On macOS 15 and later, open it once, then go to System Settings → Privacy & Security → Open Anyway, or run xattr -dr com.apple.quarantine "/Applications/3D New Era AI.app".
• Linux: tar xzf newera-linux-x64.tar.gz && ./newera/newera. Run ./newera/install-desktop.sh to add the menu entry, the icon and the .newera file type (--uninstall undoes it).

The one-line installers skip these prompts.

Connect your AI

Hosted, nothing to install. In Claude or ChatGPT, add a custom connector with the address https://mcp.3dneweraai.com/mcp and sign in with your email. Step by step: https://3dneweraai.com/connector/.

With the desktop app. The editor serves MCP at http://127.0.0.1:7878/mcp while it is open (or run newera serve for no window). The AI menu, or the MCP chip in the status bar, shows the snippet for your client, can register it for you, and lists the tools the agent calls as it calls them.

From a browser tab. Open https://3dneweraai.com/app/ and switch the MCP on in the AI panel (Ctrl+Shift+M). The tab gets an address your AI can reach through a small relay, because a tab cannot listen on a port. The relay passes messages and stores nothing; the project stays in the tab, and the address stops answering when you switch it off or close the tab. Treat that address like a password. Video rendering is not offered there, since it would hold the tab for minutes.

Then just ask, for example: "Draw a 4 × 5 m bedroom with a door and a window, furnish it and render a photo."

Client setup

One click, with the app installed:

Claude Desktop: download newera-mcp.mcpb from the latest release and open it.

Plugins with skills:

Claude Code (already set up inside a clone of this repository by .mcp.json)

claude mcp add --transport http newera http://127.0.0.1:7878/mcp

Codex CLI

codex mcp add newera --url http://127.0.0.1:7878/mcp

Gemini CLI

gemini mcp add --transport http newera http://127.0.0.1:7878/mcp

VS Code (Copilot agent mode)

code --add-mcp '{"name":"newera","type":"http","url":"http://127.0.0.1:7878/mcp"}'

Cursor — ~/.cursor/mcp.json

{ "mcpServers": { "newera": { "url": "http://127.0.0.1:7878/mcp" } } }

Windsurf — ~/.codeium/windsurf/mcp_config.json

{ "mcpServers": { "newera": { "serverUrl": "http://127.0.0.1:7878/mcp" } } }

Claude Desktop without the bundle — Settings → Developer → Edit Config (needs Node.js for the mcp-remote bridge)

{ "mcpServers": { "newera": { "command": "npx", "args": ["-y", "mcp-remote", "http://127.0.0.1:7878/mcp"] } } }

DeepSeek, Qwen, Llama and other models — the model does not matter, the app you chat in does. Use one that speaks MCP: Cline or Roo Code in VS Code, Cherry Studio, LM Studio or opencode (opencode.json):

{ "mcp": { "newera": { "type": "remote", "url": "http://127.0.0.1:7878/mcp" } } }

Any other client — Streamable HTTP at http://127.0.0.1:7878/mcp, or stdio for clients that start a process:

{ "mcpServers": { "newera": { "command": "newera", "args": ["mcp"] } } }

Over stdio, with the editor open the agent edits the plan in that window; with no window (or newera mcp --standalone) it works on a project of its own.

Showcase

A real 105 m² apartment, traced from an openly licensed floor plan and furnished, lit and photographed by an AI agent through MCP alone: walls from the scan, doors that swing the right way, a slatted TV wall, an L kitchen and wardrobes from cabinet_run, downlights sized by photometry against NBR ISO/CIE 8995-1, and path-traced photos. Every image below came out of the editor. See how it was built →

Features

• Plans from anything. Draw walls, arcs and sloping walls, or drop in a scanned plan at real scale and let background find the walls. Opens Sweet Home 3D (.sh3d) projects as they are.
• Joinery a workshop can build. Parametric cabinets, wardrobes, slatted panels, countertops with exact sink and cooktop cutouts, plaster coves with LED and modular sofas. cabinet_run fills a wall with even modules around doors, windows and corners; cut_list exports the boards as CSV or DXF/SVG sheets.
• Checked against the people who live there. An ergonomics review (circulation, beds and bathrooms per person, the kitchen triangle, wheelchair turning space) and lux per room by photometry, each finding tied to its source and with the fix ready to apply.
• Electrical and plumbing plans over the same floor plan: circuits and panel, Wi-Fi coverage, runs and checks against NBR 5410, NBR 5626 and NBR 8160.
• Pictures that sell the project. Rendered floor plans with real finishes, elevations and sections, aerial cutaways, path-traced photos with the sun from the compass and the lamps you placed, and videos along a camera path. They render on the CPU, so a headless server can take them too.
• Roofs and structure. Pitched roofs with skylights, walls and glass that follow the roof above, beams, storeys, pools and decks.
• Furniture always true to size. The catalog is generated by code, so a 158 × 208 cm bed is exactly that in the plan, in 3D and in collision checks.
• Try alternatives safely. Duplicate the plan into a new tab, change it and compare versions side by side; name checkpoints and come back to them.
• Built for agents. People and agents go through the same undoable commands. Short ids (w12), [x, y] points in centimeters, compact reads and one-line write replies keep token use low.
• Open and extensible. Plugins in any language over the HTTP API, several people on the same project with named cursors, and exports to PDF, SVG, PNG, GLB and OBJ.

MCP tools

Reads and changes are separate tools: a read never changes the plan, so an AI client can run it without asking, and asks before each change.

The hosted connector adds projects, to list and switch between the projects in your account, and leaves out feedback, the plugin tools and library / edit_library (the library is a folder on your machine), which only make sense on your own machine; the browser tab leaves out the library tools too.

Command line

newera [FILE]           # desktop editor with the embedded HTTP + MCP server
newera --demo           # start with a sample house
newera gui --no-server  # editor only
newera serve [FILE]     # headless HTTP + MCP server
newera mcp              # MCP over stdio (attaches to the open window, if any)

Options: --addr 127.0.0.1:7878 (or NEWERA_ADDR); --token (or NEWERA_TOKEN), required to listen beyond loopback; NEWERA_LOG for the log filter; NEWERA_RENDER_THREADS for photo renders (half the cores by default). The server binds to loopback by default and validates the Host header. On Windows, newera-gui.exe opens the editor without a console window.

Build from source

You need Rust 1.95 or newer (rustup). On Linux, also libxkbcommon-dev libwayland-dev libx11-dev libxcursor-dev libxrandr-dev libxi-dev.

git clone https://github.com/leandrodaf/3d-new-era-ai
cd 3d-new-era-ai
make run          # editor + HTTP + MCP, with a sample house
make release      # optimized binary in target/release/newera
make web-serve    # browser editor and viewer at http://127.0.0.1:8790

Run make to list every command. To host the browser editor yourself, serve web/ as static files, with .wasm sent as application/wasm and compressed (about 15 MB raw, a quarter of that gzipped). No backend or special headers are needed. The public site is built by scripts/site-build.sh and deployed on every push to main.

Browsers: Chrome, Edge and Safari 26 use WebGPU. Where it is missing (Firefox today) the editor falls back to WebGL 2 and still draws everything; a browser with neither gets a message pointing at the download.

Project layout

crates/
  newera-core        domain model, commands, undo/redo, geometry, standards — no UI, no I/O
  newera-catalog     parametric furniture and fixtures at exact sizes; OBJ/glTF import
  newera-joinery     parametric joinery and interiors, workshop rules, cut lists
  newera-ergonomics  habitability review: clearances, occupancy, kitchens, accessibility
  newera-draw        plan scene shared by the editor, PNG renders and SVG/PDF export
  newera-render      3D meshes, software renderer, path-traced photos, videos
  newera-sh3d        Sweet Home 3D (.sh3d) import
  newera-mcp         the MCP tools, over stdio and Streamable HTTP
  newera-server      REST API + MCP endpoint, sessions (axum)
  newera-plugins     external programs that edit the home over the HTTP API
  newera-app         desktop editor (egui + wgpu)
  newera-editor-web  the editor in the browser (WebGPU or WebGL)
  newera-web         lightweight WebAssembly viewer
  newera-relay       lets an AI reach the editor in a browser tab
  newera-cloud       the hosted service: accounts, OAuth, cloud projects, billing
  newera-telemetry   crash reports and usage notes
  newera             the binary that wires everything together

Documentation

• Architecture: crates, the command model, MCP design and security
• Standards and sources: where every rule in the reviews comes from
• Showcase: a full apartment built by an agent
• Distribution: channels, releases and the hosted service
• Roadmap and changelog

Privacy and telemetry

The app sends crash reports through Sentry, along with the notes agents leave with the MCP feedback tool. It is on by default and off with one click in Help → Send error reports, or newera telemetry off; NEWERA_TELEMETRY=0 turns it off for a single run. Nothing of the project is sent, nor the IP address or the machine's name, and the MCP token is removed from every report. Notes are always kept locally in the config folder (notes.jsonl).

Under the same switch, opening the app counts one app_open — a random installation id, the version, the operating system, the architecture and the mode — and the installers count one install and one uninstall, saying which system and whether the app came from a release or was compiled on the machine. Both go to 3dneweraai.com/ping, an endpoint of the site that holds the Google Analytics secret and forwards the count without passing the IP address on: the country Cloudflare already knows goes instead. A build made without the project's keys reports through the same endpoint, so installing from source counts like any other install; cargo build on a clone and CI count nothing. The hosted service keeps only what it needs: your email, your projects and usage, never the conversation. See the privacy policy.

Support the project

Everything above is free and stays free. If it saves you time, the Supporter plan (US$ 5/month or US$ 48/year) raises the cloud quotas for your account and pays for the server.

Contributing

Contributions are welcome. See CONTRIBUTING.md; make check runs the same checks as CI.

License

Licensed under either of Apache License 2.0 or MIT license, at your option.

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