From flat drawing to physical model in four steps
Turning a floor plan into a 3D printed house model used to require CAD expertise, expensive software, and hours of manual modeling. Now you can do it from your phone.
Upload a floor plan to Ritn3D, generate a 3D model, download the STL file, and send it to your printer. The entire digital side takes under five minutes.
What you need
- A floor plan in PDF, JPG, or PNG format
- The Ritn3D app (iOS or Android)
- A 3D printer (FDM or resin) or access to a printing service
- Basic slicing software (Cura, PrusaSlicer, or Bambu Studio)
No CAD knowledge required. No Blender, no SketchUp, no Fusion 360.
Step 1: Upload your floor plan
Open Ritn3D and tap New Project. Select your floor plan file. The app accepts PDF, JPG, and PNG formats.
PDF files work best because they preserve crisp vector lines. Photos of printed plans also work but may need more manual correction in the review step.
Step 2: Review and generate the 3D model
Ritn3D automatically detects walls, doors, windows, and room boundaries. Review the detected layout and correct anything that looks off. This typically takes 30 seconds for clean floor plans.
Tap Generate and wait. Your interactive 3D model is ready in under two minutes.
Step 3: Download the STL file
With a Ritn3D Pro+ subscription, download your model as an STL file directly from the app. Tap the download icon and select STL.
The exported STL is optimized for printing. Walls are automatically thickened to meet minimum print requirements, and door and window openings are properly cut using boolean operations.
Step 4: Slice and print
Import the STL into your slicer. Recommended settings for architectural models:
| Setting | Value | Why |
|---|---|---|
| Layer height | 0.15–0.2 mm | Good balance of detail and speed |
| Infill | 10–15% | Saves material; walls provide structure |
| Supports | Yes (touching buildplate) | Needed for window overhangs |
| Wall count | 3 perimeters | Strong exterior surface |
| Speed | 50–60 mm/s | Reduces ringing on thin walls |
Choosing the right scale
- 1:100 — fits most print beds, good all-around choice
- 1:50 — more detail, larger bed needed
- 1:200 — compact desk display
- 1:500 — keychain size
See our full scale guide for detailed recommendations.
Best materials
PLA — easiest to print, sharp details, classic white architectural look. The default choice for most users.
Resin — maximum detail for small scales. Ideal for presentation-grade models at 1:200 or smaller.
PETG — tougher than PLA, better for models that will be handled frequently or transported.
Post-processing tips
- Remove supports carefully with flush cutters
- Sand with 220-grit for smooth surfaces
- Prime and spray paint for a uniform professional look
- Glue to a base plate with a label for presentations
Print time estimates
| Scale | Print time | Material |
|---|---|---|
| 1:200 | 2–4 hours | ~30g |
| 1:100 | 6–12 hours | ~80–150g |
| 1:50 | 15–30 hours | ~300–500g |
Why Ritn3D instead of manual CAD?
Manual modeling takes 4–8 hours per floor plan. Hiring a freelancer costs $200–500 and takes days. Ritn3D does it in under two minutes, and the STL is print-ready.
Get started
Download Ritn3D, upload a floor plan, and have a 3D printed model on your desk by tomorrow. The first render is free.