BIP File

What are BIP files and how to open them

Are you having problems opening a BIP file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your BIP files.

What is a BIP file?

BIP files have multiple uses, and 3DS Max Character Studio Biped Mocap Data is one of them. Read more about the other uses further down the page.

3DS Max Character Studio Biped Mocap Data

3DS Max's Character Studio Biped motion files capture a complete animation sequence for a human-like skeleton built with the Biped tool in 3ds Max. These files are created when a motion - whether hand-keyed, driven by footsteps, edited via motion capture data, or combined via tools like Motion Flow or Motion Mixer - is saved as a Biped motion. They store not merely the skeletal pose, but the full motion data for playback and reuse.

These motion files record every component needed to reproduce the animation with fidelity on any compatible Biped structure. Saved contents include the size and scale of the original biped skeleton, footsteps (step data for walking or running), all keyframes including limb rotations, gravity settings (GravAccel), prop or accessory animations, and values for inverse-kinematics blending and object-space vs local space settings. An animation saved as such a file can later be loaded onto another Biped skeleton, combined with other motions, edited, or blended.

Technical identifiers that help distinguish this format include specific fixed byte sequences near the start of the file - for example bytes 0x9001 at offset 0 and ASCII substrings like AUTODESK 3DS MAX'X or TRUEVISION-XFILE. Associated keywords inside the content include "ORIGINALE" and "POSE1" among others. These strings and offsets can be used by software to recognize the file.

How to open BIP files

Important: Different programs may use files with the BIP file extension for different purposes, so unless you are sure which format your BIP file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested six different BIP openers which you will find listed below.

Last updated: August 24, 2026

All known file formats using extension .BIP

While 3DS Max Character Studio Biped Mocap Data is a popular type of BIP-file, we know of 2 different uses of the .BIP file extension. Different software may use files with the same extension for different types of data.

KeyShot 3D Scene

KeyShot 3D Scene files store a complete KeyShot Studio scene including geometry, materials, cameras, lighting, environment, and render settings. These files are created by KeyShot when saving a work-in-progress so that a scene can be closed and later reloaded with everything intact.

When working in KeyShot Studio, choosing "Save" or "Save As…" writes the scene into one of these files. They preserve not just the 3D model data but also the imported textures, lighting presets, backplates, camera placements, and rendering parameters. They are distinct from export formats such as OBJ or FBX because they are fully native: KeyShot uses them to reopen, edit, and continue rendering the scene later.

A KeyShot Studio scene file begins with an identifiable ASCII header string such as "//---luxion:dal:" at the very start. Inside, it contains options and settings keywords such as RENDER_SHARPER_TEXTURE_FILTERING, USE_REALTIME_RENDERER, MATERIAL, CAMERA, ENVIRONMENT_HEIGHT, as well as structural blocks like GEOMETRY, VERTICES, NORMALS, SURFACE, OBJECT, and GROUP.

Various apps that use files with this extension

These apps are known to open certain types of BIP files. Remember, different programs may use BIP files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about BIP file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.