The X_T file format is a 3D file format associated with the Parasolid geometric modeling kernel, used to store and exchange precise 3D model data.
X_T files represent complex geometries — including solids, surfaces, and assemblies — with high accuracy, making them widely adopted across CAD applications and engineering workflows.
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X_T files are commonly referred to as Parasolid Model Part files or Parasolid transmit files.
They are text-based representations of Parasolid geometry, designed to facilitate reliable data exchange between different CAD systems that support the Parasolid kernel.
An X_T file stores:
Because X_T files rely on Parasolid’s internal representation, they preserve geometric integrity across systems while remaining independent of a specific CAD application.
Unlike native CAD formats, X_T files do not contain full parametric history or 2D drafting data, focusing instead on precise 3D model exchange.
Although X_T files can technically be opened with a basic text editor such as Windows Notepad, this only reveals limited header information — for example, file creation date or version metadata.
Interpreting the actual geometry and model structure requires Parasolid-enabled CAD software or a dedicated interoperability toolkit.
X_T file formats are widely used in workflows that require accurate and interoperable 3D geometry:
Their neutrality and precision make X_T files a trusted format across engineering and design disciplines.
While X_T files preserve geometric accuracy, certain limitations must be considered:
Spatial’s 3D InterOp SDK provides robust support for X_T file import and export, enabling seamless translation between Parasolid-based formats and other major CAD kernels.
3D InterOp preserves geometry, topology, colors, and metadata while applying advanced healing and validation to ensure clean, usable models.
Combined with 3D ACIS Modeler or CGM Modeler, X_T data can be integrated into modeling, simulation, and visualization workflows with confidence — even in multi-CAD environments.
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