An .XOF file is a shared extension used in separate domains—one being an older DirectX-related 3D format holding geometry, normals, UV coordinates, materials, and texture names, sometimes flagged by "xof … txt …" or "xof … bin …," and the other being OthBase’s XML game record format for Othello, which stores moves and metadata; opening the file to check for XML versus a DirectX-style header or binary is the simplest way to know which is which.
When people say "XOF is a 3D graphics file," they’re noting that it stores the pieces of a 3D model—geometry, normals, UVs, materials, hierarchy, and occasionally animation—within an older Microsoft/DirectX lineage, appearing as either text with readable tags or binary that looks messy in Notepad, and most modern workflows convert it to formats like FBX/OBJ/GLTF, identifying it quickly by opening it and checking for an "xof …" header rather than unrelated XML.
To quickly tell what kind of .XOF file you have, note the context it came from and then open it as plain text: 3D asset origins hint at the DirectX-style model format, while Othello databases indicate XML; readable structured XML marks the OthBase type, whereas an "xof" header, 3D-centric labels, or mostly unreadable binary (often still starting with "xof") mark the 3D family, letting you sort it out before searching for any special importer or converter.
When we say "XOF is a 3D graphics file," we’re pointing out that it stores model data—not a flat photo—and in older DirectX-era pipelines it functioned like an X-file container holding mesh vertices and faces, normal vectors for lighting, UV coordinates for texture placement, and material info such as diffuse color, gloss, transparency, and texture paths.
For more regarding
XOF file error look into the page. Depending on the export method, it may also contain parent/child grouping information describing how pieces of the model are arranged, plus occasional animation details, and the file might be saved in text form—where clear section labels appear—or in binary form, which looks like gibberish despite
representing the same internal 3D elements.