Convert PLY to 3MF Online — Scan-to-Print with Color (Beta)
Convert PLY 3D scan data to 3MF for color 3D printing. This is the only conversion path on Polyvia3D that takes raw scan data with vertex colors directly to a print-ready color format. PLY stores per-vertex RGB from photogrammetry, LiDAR, and structured-light scanners. 3MF (ISO/IEC 21067) carries that color information into a format that multi-material slicers can read.
Last updated Mar 2026
Beta — 3MF support is experimental. Some models may not convert correctly.
Drag PLY file here, or click to upload
Supports .ply files up to 150MB
Usually under 3 seconds — depends on file size.
What You Should Know
What Changes During Conversion
Geometry (vertices and faces) is fully preserved. Vertex colors (RGB/RGBA) are converted to 3MF per-vertex color resources — this is the critical feature of this conversion direction. Vertex normals are preserved for smooth shading. Custom PLY properties (confidence, intensity, timestamps) are discarded. The output is an OPC package (ZIP-based) with embedded geometry XML. Units are set to millimeters by default.
Preparing Scans for Color Printing
Raw photogrammetry scans are typically too dense for consumer 3D printers. Recommended workflow: (1) Clean the mesh in MeshLab — remove floating artifacts, fill holes, fix non-manifold edges. (2) Decimate to 50K-200K faces while preserving vertex colors (MeshLab: Quadric Edge Collapse Decimation with "Preserve Boundary" and "Weighted" checked). (3) Convert to 3MF with this tool. (4) Import into your slicer and verify color assignments. Note that color printing requires enough filament colors to approximate the scan's palette.
PLY vs 3MF: Quick Comparison
| Feature | PLY | 3MF |
|---|---|---|
| Vertex Colors | Supported (RGB/RGBA) | Supported (per-vertex resources) |
| Custom Properties | Extensible (arbitrary) | Not supported |
| Units | Unspecified | Millimeters (by spec) |
| File Compression | Optional (binary PLY) | ZIP compression (60-80% smaller) |
| Primary Use | 3D scanning, research | 3D printing, manufacturing |
| Standardization | De facto (Stanford, 1994) | ISO/IEC 21067 |
Use PLY for scan data processing and analysis in MeshLab and CloudCompare. Use 3MF for 3D printing, especially when vertex colors from the scan need to drive multi-material color printing.
When to Convert PLY to 3MF
Color-Printed Scan Replicas
Print photogrammetry scans of real objects — archaeological artifacts, museum exhibits, geological samples, or personal memorabilia — as full-color physical replicas. The vertex colors from the scan map to multi-filament assignments in your slicer, producing prints that visually resemble the original scanned object.
Medical and Anatomical Model Printing
Convert color-coded anatomical scans (CT/MRI surface reconstructions with pseudo-color, or photogrammetry of cadaver specimens) from PLY to 3MF for producing color-differentiated educational models. Different tissue types can be printed in different filament colors.
Terrain and Topographic Model Fabrication
LiDAR and photogrammetry terrain scans produce PLY meshes with color data (aerial photography draped onto elevation). Convert to 3MF for printing topographic models with satellite or aerial imagery colors, useful for urban planning presentations, geological surveys, and educational displays.