An XAF file is intended to be an XML-based animation container in 3D workflows, such as those in 3ds Max or Cal3D, storing movement information instead of full character assets, so opening it in a text editor reveals structured XML with numbers describing timing, keyframes, and bone transforms that don’t "play," and the file contains only animation tracks while omitting meshes, textures, materials, and other scene data, requiring a compatible rig to interpret it.

When dealing with an XAF file, "opening" it typically requires loading it into the correct 3D software—such as 3ds Max’s animation system or a Cal3D workflow—and mismatched bone structures can cause twisting or incorrect motion, so a fast identification method is searching the top of the file in a text editor for "Cal3D" or 3ds Max/Biped/CAT references to see which tool can load it and what rig should accompany it.
An XAF file centers on animation data rather than complete character assets, typically holding timelines, keyframes, and tracks that drive bone rotations or other transforms tied to specific bone names or IDs, often with interpolation curves for smooth motion, and depending on the pipeline it may store one animation or many while always defining skeletal movement over time.
An XAF file generally doesn’t provide everything required to display a finished animation, offering no geometry, materials, textures, lights, or cameras and often not providing a full rig definition, instead assuming you already have the proper skeleton loaded, so by itself it’s just choreography without a performer, and importing it onto mismatched rigs—those with different bone names, structures, orientations, or proportions—can break the animation or distort it with twists and offsets.
To determine which type of XAF you’re dealing with, the fastest method is to open it as a self-describing text file, using Notepad or ideally Notepad++ to see if it’s readable XML—structured tags mean XML, while scrambled symbols could imply a binary or misleading extension—and if it is readable, use Ctrl+F or skim the first 20–50 lines for terms like Max, Biped, CAT, or Autodesk plus recognizable bone names that point toward a 3ds Max animation workflow.
When you have any inquiries regarding wherever along with tips on how to employ file extension XAF, it is possible to call us on our own web site. If you find explicit Cal3D wording or XML attributes that define Cal3D clip/track structures, you’re likely looking at a Cal3D XML animation that expects matching Cal3D skeleton and mesh files, whereas detailed DCC-style transform tracks and familiar rig identifiers tend to match a 3ds Max workflow, and efficient game-oriented clip formats signal Cal3D; external associated files and especially the first lines of the XAF provide the strongest confirmation.