D3DBSP File

What are D3DBSP files and how to open them

Are you having problems opening a D3DBSP 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 D3DBSP files.

What is a D3DBSP file?

A .D3DBSP file is a Call Of Duty Map file.

Call Of Duty Map files store level geometry and metadata for Activision's Call of Duty games using a binary space partitioning (BSP) style layout. They are produced by the game's map compiler tools from editable map designs. Their purpose is to allow the game engine to load and render playable 3D environments with terrain, buildings, textures, lighting, collision data, visibility, and entity placements.

The editor programs (often called "Radiant" or similar in the Call of Duty mod tool suite) let designers define levels in a source format (.map) that describes brushes, patches, light entities, surface textures, etc. A compiler tool (e.g. cod2map.exe for CoD2, cod4map.exe for CoD4) reads the .map source files, computes visibility data, builds BSP trees, calculates lightmaps and colliders, and writes out the compiled version of the map in the Call Of Duty Map format for the game engine to read at runtime.

Files of this format begin with the ASCII magic "IBSP" followed by a version number and a lump directory. The lump directory holds a sequence of lump IDs and lengths, each lump storing a specific type of data (e.g. materials/textures, lightmaps, entities, node and leaf structures for BSP tree, collision meshes). Offsets to data sections can be calculated from the lump lengths.

How to open D3DBSP files

Important: Different programs may use files with the D3DBSP file extension for different purposes, so unless you are sure which format your D3DBSP file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: September 19, 2026

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 D3DBSP file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.