Export 3D mesh to STL, OBJ, or GLTF

Export computed 3D meshes to STL, OBJ, or GLTF format.

Problem

After computing 3D polygon meshes from RTSTRUCT or SEG objects (see use case 5.8.1), the geometry must be exported to an interoperable format. Surgical planning platforms typically require STL; game engines and web viewers use GLTF; legacy pipelines use OBJ. Switching between formats should require no external tools.

Steps

1. Open a DICOM RTSTRUCT or SEG file (⌘O) and verify the 3D mesh preview shows the expected geometry.
2. Click Export in the 3D preview panel — the export sheet appears.
3. Choose a format — select STL, OBJ, or GLTF from the format picker.
4. Select structures — check the structures or segments to include in the export. Deselect any you want to omit.
5. Click Export — choose a destination folder and confirm. Files are written with one file per structure for STL/OBJ, or a single bundled .gltf/.glb for GLTF.

Result

The selected structures are written to disk in the chosen format. Each exported file contains only the triangle geometry for that structure; colour and label metadata are preserved in OBJ material files and GLTF material extensions. The originals DICOM files are untouched.