Your idea.
A building you
can explore.

Use Copy validation errors and send those messages plus the complete JSON back to your AI. Ask it to return one complete, corrected file. If you edit JSON in the review box, include everything from the opening { to the closing }, without Markdown fences or explanatory text. A rejected import does not replace your current building.

Arrange the camera in Interior Design or Containers, then choose Render realista. The image refines progressively with bounced light and reflections. Preview is faster; High and Ultra produce larger images. Download the PNG when ready, or close the render to keep editing. This uses your device’s graphics hardware; it is a still-image render, separate from the real-time timelapse.

Every registered account includes 5 private projects for free. The optional Plus plan provides 25 projects total for $9.99 USD/month through PayPal; checkout availability appears in My Projects. Geographic imports allow a 0.25 mile radius on Free and 0.5 miles on Plus, with up to 2,000 mapped features per import. Dense areas may be incomplete. Cancel anytime. After your paid period ends, your limit returns to 5, and all saved projects remain accessible and editable. Each project can hold up to 4 MB. JSON downloads remain available without a subscription.

Yes. Open Coastal Courtyard Home, drag furnishings, change containers and finishes, or add and remove pieces. Refreshing restores the original sample in that tab. To keep your changes, save a separate project in your account or export a layout before refreshing.

The renderer uses the geometry and materials in the JSON. It cannot recover details missing from that file. More views and real measurements help; refine the overall proportions first, then floor spacing, façade patterns, windows, balconies, and roof details. Photo-based designs remain estimates within the app’s supported shapes.

Yes. Choose Download JSON, keep the file, then use Open JSON in the same section. On mobile these actions are in Project; on desktop use Project files (or Projects & view in Flowchart). No account is needed. Interior files include all six rooms and their furniture, sizes, positions, doors and windows. Container files include furniture, openings, stair connections, finishes and scenery; Flowchart files preserve shapes and connections. These are editable designs, unlike PNG images or videos. Opening a valid file replaces that section’s design; Undo restores the previous design. Download again after editing to keep your latest changes.

A compatible project or design JSON preserves the supported building geometry and properties so you can reopen and edit it. Camera angle, lighting, screen size, and later renderer updates can change the appearance of a view; save a 3D image if you also want to keep a specific presentation.

Select the wall they should belong to, then add a window or door. Adjust its size and position in the element properties. Openings must fit inside their wall and cannot overlap other openings on that wall.

No. The studios currently maintain separate designs within your workspace. Use each for its own concept; they do not automatically combine into one coordinated building model.

Building3D is a concept-design and visualization tool. Its models, area summaries, and construction animations do not replace measured surveys, professional engineering, code checks, or approved construction documents.

Yes. The design API supports permission-controlled access to building designs. Signed-in users can create scoped, expiring API keys for tools they choose. See the API & JSON guide for setup and supported operations.