Foursite Pro Editor: Full Floor Plan Control for Designers | VirtualSpaces

When One Click Is Not Enough: The Foursite Editor and Workflow Tools Built for Precision

The two previous pieces in this series covered what happens when you let the AI do the heavy lifting: ArchiSculpt converting a 2D floor plan to a navigable 3D model in minutes, auto-furnishing a room with one click, generating a photorealistic styled interior in seconds. Those features are genuinely fast, and for most client presentations they will be enough.

But there are moments in a design project when fast is not the point. When a client needs a wall moved 18 inches to the left to accommodate a structural column. When the furniture layout the AI placed needs a custom piece from the designer's own specification list. When a floor plan has been through four layout iterations and the designer needs to compare all of them without rebuilding anything. When the render that needs to go to a developer tomorrow has to match spec exactly.

For those moments, Foursite has a full set of precision editing and workflow tools that sit alongside the AI. They are the third layer of the platform, and they are designed for the designer who knows exactly what they want and needs the tool to keep up. This is what is coming in that layer.

The Pro Floor-Plan Editor: Draw Anything, Scale Everything

At its core, the pro floor-plan editor in Foursite is a CAD-style drawing environment that runs in the browser. No install, no plugin, no file export to a separate application. It lives in the same tab as the 3D viewer and the AI tools, so switching between editing the plan and walking through the 3D result is instant.

What the editor lets you draw:

• Straight walls: any length, any direction, snapped to grid or placed freehand

• Curved walls: arcs and bends for non-rectangular rooms or architectural details

• Doors and windows: placed per opening, with swing direction for doors and orientation for windows

• Rectangular rooms: drawn quickly by dragging a box to set dimensions

• Freeform rooms: any polygon shape, for irregular floor plans or non-standard layouts

Every element drawn in the editor flows immediately into the 3D model. Add a wall, and it appears in 3D. Move a door, and the opening shifts in the rendered scene. The floor plan and the 3D model are not two separate files that need to be kept in sync. They are the same project, and editing one updates the other in real time.

For interior designers who receive floor plans from architects and need to adapt them to a client's brief, this means changes happen in the same environment where the client presentation lives. You do not export the plan, open it in a second application, make the change, re-import it, and wait for the 3D to rebuild. You draw the change and the 3D is already there.

For architects working on residential projects who want to test layout alternatives quickly, the editor supports the kind of rapid iteration that normally requires dedicated CAD software. The difference is that every iteration here is immediately viewable as a 3D walkthrough, not a flat drawing waiting for a separate render.

The editor also handles the detail level that matters for real project work. Live dimension annotations display measurements as you draw, so you always know the exact size of what you are placing. A measure tool lets you check distances between any two points on the plan. Undo and redo work across every action, so there is no penalty for exploring.

Dimension Calibration and the CAD Block Catalogue: Working to Real Scale

A floor plan that is not calibrated to real-world dimensions is a visualization tool. A floor plan that is calibrated is a specification tool. The difference matters when a client is choosing furniture, when a contractor is building to plan, or when a developer needs to confirm that a unit layout meets the square footage they committed to.

Foursite's dimension calibration feature lets you set real-world scale from a single known measurement. Identify a wall with a known length, set that length in the calibration tool, and every other element in the plan rescales automatically. Walls, rooms, furniture, openings: all adjusted proportionally from that single reference. The live dimension annotations update to reflect real measurements throughout.

Once the plan is calibrated, the CAD block catalogue becomes a precision placement tool. The catalogue is a searchable library of top-down furniture symbols: sofas, beds, dining tables, office chairs, kitchen appliances, bathroom fixtures. Drag any block from the catalogue onto the canvas and it places at true scale, sized correctly for the calibrated plan. A king bed lands at 76 by 80 inches. A standard dining table lands at the right footprint for the number of seats. The furniture in the plan is the furniture that will actually exist in the space.

From there, each piece is fully editable by hand. Move it, resize it, rotate it, flip it, rename it. If a client specifies a particular sofa with non-standard dimensions, you enter those dimensions and the block adjusts. If a room works better with the bed rotated 90 degrees, that takes a single action. The CAD catalogue gives you a fast starting point; the editing tools give you exact control from there.

For interior designers who work with client-supplied furniture specifications, this feature closes a workflow gap that has existed for years. The furniture in the VirtualSpaces floor plan is no longer a decorative approximation. It is the actual spec, placed at the actual scale, in the actual room. When that floor plan converts to a 3D render, the proportions are correct because the source data was correct.

Live 3D Picture-in-Picture: Edit the Plan and Watch the Space Update

One of the friction points in any floor plan workflow is the context switch: you make a change in the 2D editor, then navigate to the 3D view to see what it looks like, then navigate back to make another change. On a simple plan with a few edits, this is manageable. On a complex plan with multiple layout iterations happening in a single session, it compounds fast.

Foursite's live 3D picture-in-picture feature removes that switch entirely. A floating 3D viewer hovers over the floor-plan editor in a draggable, resizable window. As you draw walls, place furniture, and adjust the plan, the 3D model updates in real time in that window. You see the plan and the 3D space simultaneously, in the same view, without navigating away from either.

The practical effect of this is significant for how a design session actually runs. When a client is in the room and you are adjusting a layout based on their feedback, you do not need to switch views to show them what the change looks like in 3D. You make the change in the editor and they watch it happen in the floating viewer. The feedback loop that usually spans multiple navigation steps collapses into a single action.

For designers who do a lot of iterative layout work, this changes the pace of a session. You stay in the editing mindset rather than constantly switching to a preview mindset. The 3D view becomes ambient context rather than a destination you have to navigate to. That shift sounds small, but across a full design session it adds up to significantly more work completed and significantly fewer moments of "let me show you what that looks like" becoming a navigation exercise.

Saved Layouts: Design Options Without Starting Over

Client presentations often require showing multiple layout options for the same room. Option A has the sofa facing the window. Option B has the sofa anchoring a conversation zone away from it. Option C uses a sectional instead of a standard sofa and redistributes everything around it. Traditionally, producing those three options means either maintaining three separate files or rebuilding the layout from scratch each time the client wants to revisit a direction they passed on.

Foursite's saved layouts feature keeps multiple furniture arrangements per room in the same project. Save a layout, name it, and continue iterating. Save another version, cycle back to the first, re-apply it, compare them side by side. The layout you saved last week loads automatically the next time you open the project. Nothing is lost, nothing needs to be rebuilt.

What saved layouts make possible in practice:

• Present two or three layout options to a client in a single session without file juggling

• Revisit a direction a client dismissed in an earlier meeting without reconstructing it from memory

• Keep a working layout and an approved layout in the same project for reference during installation

• Name layouts clearly so a collaborator joining the project can navigate the design history

• Delete versions that are no longer relevant without affecting the rest of the project

For designers managing multiple clients or multiple units within a development project, saved layouts mean design options are an asset that accumulates rather than work that disappears. Every direction you explored is preserved. Every client response to every option is something you can return to. The project history is the design record.

Unified Undo/Redo, Autosave, and Gallery: The Workflow That Does Not Lose Work

Three features in Foursite's workflow layer do not announce themselves in client presentations, but they are the ones that make the difference between a tool you can rely on and one you approach carefully.

Unified undo/redo maintains a single history stack across geometry and furniture, across tabs. Move a wall, place a sofa, rotate a chair, change a room shape: all of those actions are in the same stack, and stepping back through them works exactly as expected. There is no separate undo history for the floor plan editor and the furniture placement tool. One stack, one history, full control. For designers who explore quickly and sometimes need to step back several actions, this is the difference between a tool that supports creative iteration and one that requires caution.

Autosave means edits persist automatically throughout a session. There is no save button to remember, no prompt when you close the tab, no lost work if the browser refreshes. The project state at any given moment is the state that will be there when you return. For designers working across multiple sessions on a single project, this is a baseline expectation that Foursite meets without requiring any action.

The gallery saves every AI render automatically as it is generated. Every photoreal image produced during a styling session, every AI redesign from a client meeting, every interior design render created during the project: all stored in the project gallery, labeled and accessible. Nothing needs to be manually exported or saved before closing. When a client asks three weeks later for the render from the second meeting, it is in the gallery.

Together, these three features remove a category of anxiety that designers carry through every session with most tools: the fear of losing work. That fear changes how you use a tool. When you know that nothing will be lost and everything can be undone, you explore more freely, iterate more quickly, and spend less time managing files and more time designing.

What the Full Platform Looks Like

Across three pieces, we have covered the complete Foursite feature set coming to the platform. It is worth stepping back and looking at how the layers fit together:

The complete platform runs in a single browser tab, with no installs, no plugins, and no file handoffs. A 2D floor plan or architectural blueprint goes in. A navigable, furnished, styled, photorealistic 3D space comes out. Every step from convert-floor-plan-to-3D to finished client presentation happens inside VirtualSpaces's platform.

For interior designers, the implication is a significant compression of the pipeline: less time in software handoffs, less time waiting for renders, less time reconstructing work, and more time doing the actual creative work of designing spaces for the people who will live in them.

For residential developers, it means pre-sales visualization, unit-by-unit styling, and floor plan iteration all happen at a pace that matches the pace of the project rather than the pace of a render queue.

For architects presenting residential projects, it means the client experience of reviewing a design shifts from reviewing a 2D drawing to walking through a 3D space, in the same meeting where the design decisions need to be made.

What to Do Now

All of these features are coming to Foursite. The platform is in active development. If your practice depends on presenting residential spaces to clients, on moving from blueprint to 3D to approval faster, or on giving clients a visualization experience that matches the quality of the design work you do, it is worth getting in early.

The gap between what a designer sees and what a client understands has been the central problem in residential design visualization for decades. VirtualSpaces is building the platform that closes it. These three layers of features are how.