Valve Releases Steam Frame CAD Files for Custom Mods and Accessories

Valve has released official CAD files for its Steam Frame VR headset, giving modders and hardware enthusiasts the resources to design custom accessories and replacement parts. The files became available on October 9, 2026, through Valve's public GitLab repository.

The release includes 3D models of the headset, controllers and head strap, alongside technical documentation for the hardware's expansion port. Valve is making the materials available for non-commercial use, allowing enthusiasts to develop and share modifications based on the headset's original designs.

Valve has provided STEP-format reference models for the Steam Frame's core module, head strap and controllers. These simplified models contain the dimensions and physical details needed to design accessories that fit the existing hardware.

The files could help modders develop alternative head straps, replacement facial interfaces, custom grips and 3D-printed attachments. Components such as the light blocker and battery housing are also designed with user replacement in mind.

Valve has included documentation showing the locations of the controllers' infrared tracking LEDs. This allows accessory designers to avoid covering the sensors when creating grips or protective attachments that could otherwise interfere with tracking.

The reference models provide a starting point for modifications without requiring creators to manually measure or scan the headset.

Beyond the physical designs, Valve has published electrical specifications for the Steam Frame's front expansion port. The connector supports high-speed camera interfaces and a PCIe Gen 4 connection, allowing compatible external hardware to communicate with the headset.

The repository also contains example USB 3.0 hub designs created using Altium and KiCad. These provide reference materials for developers interested in building accessories that use the expansion port.

Potential applications include additional cameras, USB peripherals and other specialized attachments. However, Valve has not announced these as official accessories, and the reference designs do not guarantee that every proposed modification will work.

Developers must also account for the port's electrical requirements and power limitations when designing compatible hardware.

The CAD files are distributed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 license. Enthusiasts can use, modify and share the designs for non-commercial purposes, provided they credit Valve and follow the license conditions.

Creators who want to sell products based on the released materials must contact Valve about commercial licensing.

The repository also includes warnings about modifying the hardware. Valve states that opening the headset's outer enclosure or connecting electrical accessories without the Steam Frame Compatible designation will void the warranty.

The release gives the Steam Frame modding community official technical references for developing accessories. It also allows independent hardware creators to begin experimenting with the headset's modular design, although any new accessories will still need to be developed and tested.