Read JT for PLY conversion
A JT-to-PLY workflow combines the JT reader with the PLY writer. Use it when the receiving application needs PLY 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.
Select the polygon data required by the PLY consumer
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 a polygonal derivative with the OCCT PLY interface. Agree on the mesh and property fields needed by the consumer: the PLY extension alone does not guarantee compatible color or other per-element property handling. Keep assembly and CAD metadata separately when it has no destination mapping.
Validate the PLY 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.
Reopen the PLY in the downstream processing tool and compare units, bounds, surface coverage and the expected properties. Native PLY support in the catalog is write-only; this route does not imply a native PLY reader for the reverse direction.
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.