Convert BSP to VMF

Understanding BSP and VMF file formats

BSP (Binary Space Partitioning) files are compiled map files used by game engines like Valve's Source and GoldSrc. They contain all the geometry, textures, entities, and lighting information required for a game map to function in the engine. BSP files are optimized for fast rendering and efficient in-game performance, but are not easily editable.

VMF (Valve Map File) is a text-based format used by Valve's Hammer Editor. VMF files store map data in a human-readable format, making them ideal for editing and further development. Unlike BSP, VMF files are not used directly by the game engine but are compiled into BSP files for gameplay.

Why convert BSP to VMF?

Converting a BSP file to a VMF file allows you to decompile a compiled map back into an editable format. This is useful for map editing, learning from existing maps, or porting maps between games that use the Source engine.

How to convert BSP to VMF

Since BSP files are compiled and optimized, converting them back to VMF is called decompiling. This process attempts to reconstruct the original map structure as closely as possible, but some data may be lost or altered due to the nature of compilation.

Recommended software for BSP to VMF conversion

• BSPSource: The most popular and reliable tool for decompiling BSP files to VMF. It supports most Source engine BSP formats and is regularly updated.

Steps to convert using BSPSource

1. Download and install BSPSource.
2. Launch BSPSource.
3. Click File → Open and select your BSP file.
4. Choose the output directory for the VMF file.
5. Click Decompile to start the conversion process.
6. Once finished, open the resulting VMF file in Hammer Editor for further editing.

Important notes

• Decompiling may not perfectly restore the original map, especially for complex or heavily optimized BSPs.
• Always respect the original map creator's rights and seek permission before editing or redistributing decompiled maps.