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3d-new-era-ai

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SUMMARY

Open-source home design and floor plan editor in Rust (a Sweet Home 3D alternative) with a built-in MCP server: your AI agent draws walls, furnishes rooms, checks lighting and ergonomics, and renders photos — live, on your own machine.

README.md

3D New Era AI

English · Português (Brasil) · Website

CI
License: MIT OR Apache-2.0
Latest release

An open-source home design, floor plan and interior design editor written in Rust —
a Sweet Home 3D alternative for Windows, macOS and Linux — that is AI-native from day
one: the editor ships with a built-in
Model Context Protocol server, so an AI agent draws
walls, furnishes rooms, builds joinery, checks lighting and ergonomics against standards
and renders the photos alongside you, with every change showing up live on screen and one
Ctrl+Z away. Everything runs on your own machine: no account, no subscription, no cloud.
The interface speaks Portuguese, English, Spanish and French.

Editor with a furnished 105 m² apartment: catalog, rendered floor plan and live 3D view

Download

Windows — open PowerShell and paste:

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

macOS (Apple Silicon and Intel) — open Terminal and paste:

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

That's it: the app shows up in the Start menu / Launchpad, no administrator password,
and the same command updates it. Prefer a plain download?

Windows (64-bit) Mac Apple Silicon Mac Intel Linux (x64)
First launch of a plain download

The builds aren't signed with a paid Apple or Microsoft certificate, so the system asks
once:

  • Windows: unzip, open newera-gui.exe; if SmartScreen appears, click
    More info → Run anyway.
  • macOS: unzip and move 3D New Era AI to Applications. 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 it to the menu with its icon and to give
    .newera files their own icon and double click (--uninstall undoes it).

The one-line installers above skip these prompts.

Next: connect your AI — Claude, Codex, Gemini, Cursor, VS Code,
DeepSeek and others.

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, slatted TV wall, L kitchen and wardrobe from cabinet_run,
downlights sized by photometry against NBR ISO/CIE 8995-1, path-traced photos.
Every image below came out of the editor itself.
See how it was built →

Floor plan with real finishes Aerial cutaway
Rendered floor plan with real finishes Aerial cutaway of the apartment
Daylight At dusk, lamps on
Living room with slatted TV wall Dining table under the pendant at dusk
Dining and living toward the window L-shaped kitchen at night
L-shaped kitchen with terrazzo floor Master bedroom at night
Joinery and rooms
Slatted TV wall with the TV embedded Home office with desk and bookcase
Master bedroom with tall wardrobe run Bathroom with Nero marble wall

Why

  • Fast and light. Native Rust, GPU rendering through wgpu (Vulkan, Metal, DirectX 12).
  • One command, everything running. The window, the REST API and the MCP server
    start together and share the same document.
  • AI as a first-class client. People and agents go through the same undoable
    commands. An agent's edit is one Ctrl+Z away.
  • Cheap for agents. Short ids (w12), [x, y] points, compact reads and
    one-line write replies keep token usage low.
  • Real-world scale. Everything is in centimeters, like architectural drawings.
  • Try alternatives safely. Duplicate the plan into a new tab, change it, and compare
    versions side by side.
  • Furniture that is 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.

What it does

  • Plans from anything. Draw walls, arcs and sloping walls, or drop in a scanned plan
    at real scale and let trace_background find the walls. Open 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, kitchen triangle, wheelchair turning space) and lux per
    room by photometry, both against Brazilian standards (NBR 9050, NBR 15575-1,
    NBR ISO/CIE 8995-1), each finding with the fix to apply.
  • 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 without a graphics
    card, 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.
  • Anywhere. Desktop editor, the full editor in the browser (WebGPU or WebGL), a
    lightweight WebAssembly viewer, plugins in any language over the HTTP API and several
    people on the same project with named cursors.

Build from source

The installers from Download work for your user only: they put the app in
~/Applications or %LOCALAPPDATA%\Programs, add newera to your PATH, register the
MCP server in Claude Code and Codex if you have them, and delete their temporary files. Uninstall
with install-macos.sh --uninstall or from Settings → Apps on Windows. On a Mac with no
build for it, or with NEWERA_REF=<branch>, the installer compiles from source instead.

To work on the code you need Rust 1.95+ (rustup). On Linux you also
need 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

Run make to see every development command. make web-serve builds the browser editor
and viewer and serves them at http://127.0.0.1:8790.

Connect your AI

Open the editor (or run newera serve for no window). It serves MCP at
http://127.0.0.1:7878/mcp — point your AI there and it edits the plan you see, live.

In a browser, with nothing installed. Open https://3dneweraai.com/app/,
switch the MCP on in the AI panel (or Ctrl+Shift+M) and the tab gets an
address your AI can reach — paste it where you would paste the local one. A
small relay stands between the two because a tab cannot listen on a port; it
passes messages and stores nothing, the project never leaves the tab, and the
address stops answering the moment you switch it off or close the tab. Treat
that address like a password: whoever has it can edit the project that is
open. render_photo and video are not offered there — they run for minutes
on a CPU and would freeze the window; that is what the app is for.

The relay is in this repository (newera-relay) and is a service like any
other: cargo run -p newera-relay puts one on 127.0.0.1:7979, and
/app/?relay=http://127.0.0.1:7979 points the editor at it — which is how to
run this whole path on your own machine, or on your own server. Whatever it is
pointed at, nothing of the project is stored there: the calls pass through and
the drawing stays in the tab.

The window does this part for you: the AI menu (or the MCP chip in the
status bar) opens a panel with the address, the snippet for whichever client
you use, and — when that client has a command line and it is installed — a
button that registers it from there, no terminal. The same panel is how you
know it worked: it names the client that connected and lists the tools it is
calling, as it calls them. The status bar says it too, from across the room.

Claude Code

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

Inside a clone of this repository it's already set up by .mcp.json (approve newera once).

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 — 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 doesn't matter, the app you chat in
does. Use one that speaks MCP and add the URL above: 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, for clients that only start a
process, stdio with newera mcp:

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

With stdio the agent works on its own project in the background, not on the open
window; use the URL to design together live. Then just ask, for example: "Draw a 4 × 5 m
bedroom with a door and a window, furnish it and render a photo."

Tools

Tool What it does
get_home Compact state (detail=summary for counts, bounds and room areas)
create Walls (polylines, arcs, sloping hs), rooms (polygon or detected from walls, dividers), dimensions, labels, roofs with skylights and solids from outlines or profiles — one atomic call
update / move / delete Edit any element by id
arrange Copies in a row, rotate, mirror, group/ungroup, drawing order
split_wall / merge_walls Split a wall in two, or join walls on one line into a single wall
checkpoint Name where the plan is and come back to it, keeping every id
set_home Project name and compass (north)
set_background Scanned plan at real scale: calibrations, X/Y scale, rotation
trace_background Find walls in the scanned plan and list or create them
joinery Parametric cabinets, slatted panels, countertops with cutouts, plaster coves, shadow gaps and modular sofas; workshop rules come back as notes and never refuse to draw
cabinet_run Fill a wall with cabinets sized for it: even modules around corners, doors, windows, fridge and stove, drawer unit by the stove, blind corners in L kitchens
fit_roof Walls, glass and panels take the shape of the roof above (A-frame gables, sheds) and keep following it
embed Embed a sink bowl or cooktop in a countertop (exact cutout) or an oven/microwave in a cabinet niche; the item moves with its host
lighting Lux per room by photometry (fixtures in lm/W, color temperature, spots, LED panels and strips) against NBR ISO/CIE 8995-1; fill places the fixtures a room needs
ergonomics Review for the people living there: circulation, beds/seats/bathrooms per person, kitchen, doors, ceiling heights, windows, wheelchair use (NBR 9050, NBR 15575-1)
cut_list Cut list of the joinery builds (boards merged, edge banding, hardware) as CSV, or DXF/SVG sheets
render_plan PNG of the plan, exactly as the user sees it (bg overlays the scan)
render_3d Software 3D: aerial, visitor, stored cameras, elevations and sections
render_photo Path-traced photo with sun and lamps
export_plan PDF, SVG, PNG plan; GLB/OBJ model
save_home / open_home / new_home Projects (.newera) and Sweet Home 3D import (.sh3d)
catalog Search the parametric furniture catalog (rows [id,name,w,d,h])
place Furniture, doors and windows (snap into walls, swing side), beams, finishes, glass, batch defaults
check_layout Overlaps, pieces in walls, blocked doors, cabinets turned against their own fronts, doors in no wall, pieces outside rooms, areas vs. reference
variants Plan versions as tabs: list with stats, duplicate, switch, rename, delete
levels / cameras / video Storeys, points of view, camera path videos
materials / disciplines / annotations Finishes, electrical and plumbing projects, dimension chains and reference schedules; stale finds notes whose numbers stopped matching the drawing, anchor ties dimensions to what they mark so they measure themselves again
measure Tape over the plan: free floor around a piece, the gap between two, what a straight probe runs into — and fit, how big a piece can grow before a clearance breaks
plugins / sessions External plugins and the people working on the project
undo / redo / checkpoint Shared history with the user; named points to come back to, ids intact

Modes

newera [FILE]           # desktop editor with 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

Options: --addr 127.0.0.1:7878 (or NEWERA_ADDR), --token (or NEWERA_TOKEN, required
to listen beyond loopback), log filter via NEWERA_LOG, 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.

In the browser

The same editor compiles to WebAssembly and runs in a page, with no server behind it:
the project lives in the tab and is saved to a file with Save.

make web-editor   # builds web/editor/pkg with wasm-bindgen
make web-serve    # viewer on / and editor on /editor/ at 127.0.0.1:8790

The published site is built by scripts/site-build.sh — landing page at the root, editor
at /app/, viewer at /viewer/ — and deployed to Cloudflare Pages by
.github/workflows/publish.yml on every push to main that touches it.

Browsers. Supported: Chrome and Edge, and Safari 26, which has WebGPU. Where
WebGPU is missing — Firefox today — the editor falls back to WebGL 2 and still draws
everything, plan and 3D; it works, but it is not a browser we guarantee, and the page says
so. A browser with neither gets a message pointing at the download instead of a blank
page.

To put it on a host of your own, serve the web/ folder as static files. Two things
matter: .wasm must be served as application/wasm, and it must be compressed — the
editor is about 15 MB raw and roughly a quarter of that gzipped, so
gzip_types application/wasm; (nginx) or the equivalent is the difference between a
three-second load and a thirty-second one. Nothing else is needed: no COOP/COEP headers,
no backend, no database. The MCP server is part of the desktop program and is not built
into the page — a browser tab is for drawing and showing, and the agent works against the
app running on someone's machine.

scripts/web-editor-e2e.mjs is the check CI runs on it: headless Chrome, draws a wall
with the mouse, opens the viewer, and fails on any error the page logs.

Project layout

crates/
  newera-core        domain model, commands, undo/redo, geometry, lighting — no UI, no I/O
  newera-joinery     parametric joinery and interiors: parts, workshop rules, cut lists, cabinet runs
  newera-ergonomics  habitability review: clearances, occupancy, kitchens, accessibility
  newera-catalog     parametric furniture and fixtures at exact sizes; OBJ/glTF import
  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-plugins     external programs that edit the home over the HTTP API
  newera-mcp         MCP tools (rmcp), stdio and Streamable HTTP
  newera-server      axum: REST API + MCP endpoint, sessions
  newera-app         desktop editor: egui + wgpu
  newera-editor-web  the editor in the browser (WebGPU or WebGL)
  newera-web         WebAssembly viewer: plan SVG and 3D views
  newera             the binary that wires everything together

See docs/ARCHITECTURE.md for how it fits together,
docs/SHOWCASE.md for a full project built by an agent,
docs/NORMAS.md for the standards the review leans on — with
edition, tier and link, in Portuguese because the sources are Brazilian — and
docs/ROADMAP.md for what comes next.

Telemetry

Released builds send crash reports to the developers through Sentry, and the
notes agents leave with the MCP feedback tool — what a tool could have done
better, with the call, the reply and what must not get worse. 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), sent or not. A build from source reports
only when built with NEWERA_SENTRY_DSN.

Released builds also count one thing in Google Analytics: that the app was
opened, with its version, the operating system and the mode (gui, serve,
mcp). It rides the same switch, carries an id drawn at random for the
installation — not a person — and needs NEWERA_GA_API_SECRET at build time,
so a build from source counts nothing. The site counts page views in the same
property; the project itself never leaves your machine either way.

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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