Read JT for OBJ conversion
A JT-to-OBJ workflow combines the JT reader with the OBJ writer. Use it when the receiving application needs OBJ data from an existing JT model.
JT can contain stored visualization meshes, embedded Parasolid BRep, or both. Select the representation needed for the destination before reading the assembly. The Parasolid interface imports precise geometry only when the JT file contains Parasolid BRep data.
Prepare polygonal geometry for OBJ
For a mesh route, select a suitable stored level of detail or tessellate the imported Parasolid BRep with the required deflection. For a precise-geometry route, use the embedded BRep; a mesh-only JT file cannot supply the original CAD surfaces.
Write the selected surface mesh with the OBJ interface. Establish whether the consumer needs per-part grouping, normals or supported appearance information, and preserve any associated material resources produced by the writer. A polygon file is not a replacement for the full CAD document.
Validate the OBJ result
Check part placements and repeated instances as well as names, colors and transparency. A stored coarse level of detail cannot regain surface detail merely by changing file format.
Check the OBJ in the receiving graphics or geometry tool, including scale, face orientation, grouping and companion-file references. Where a flat mesh cannot retain the original assembly relationships, keep that engineering information separately.
For a production pipeline, keep a representative source file and its expected geometry and attributes with the conversion settings. Discuss conversion integration with the source and destination applications, or compare the supported format interfaces.