An .XOF file shows how file extensions can mislead because ".xof" is reused by unrelated software, most commonly for an older DirectX-related 3D model format and for OthBase’s XML Othello game records; the 3D version may contain geometry, normals, UVs, materials, textures, and sometimes animation—often flagged by headers like "xof … txt …" or "xof … bin …"—while the OthBase type is plain XML starting with tags like `<?xml …?>`, so opening the file in a text editor is the fastest way to tell which one you have.
When people say "XOF is a 3D graphics file," they’re saying it contains the core structure for rendering 3D models in the legacy DirectX ecosystem, including meshes, normals, UV layouts, materials, frame hierarchies, and sometimes animation, stored as readable ASCII or binary, and because newer tools vary in compatibility, users often convert it to FBX/OBJ/GLTF, confirming its type by looking for an "xof …" header or 3D sections in a text editor.
To quickly tell what kind of .XOF file you have, rely on easy inspection: a source involving 3D assets, DirectX, or older game content suggests the 3D/X-file family, while anything from an Othello database or OthBase workflow aligns with the XML version; opening it in Notepad reveals readable XML for the OthBase style, but "xof" headers or 3D-like keywords—plus binary noise if it’s a binary variant—indicate the 3D type, making this enough to classify the file before seeking converters.
When we say "XOF is a 3D graphics file," we mean it’s a container for information a graphics engine uses to draw objects rather than a flat picture, and in older Windows/DirectX pipelines it followed the legacy X-file style by storing meshes made of vertices and triangles, normals for lighting, UV coordinates for texture mapping, and materials describing color, shine, transparency, and linked texture filenames.
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Depending on the export settings, it can also provide node-level organization for arranging components and may include animation-related information, with the file saved either as human-readable text showing clear labels or as binary that looks messy while still containing identical 3D data internally.