Qt

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Qt is a cross-platform application and UI framework - some tools from Valve utilize Qt.

Valve ships a modified version of Qt, primarily to allow interoperation with the rest of Source 2:

• Valve-Modified Qt 5.15.2 for Win64 (Source 2 Workshop Tools since March 2021, Dark Mode is available on this version.)
  • Valve-Modified Qt 5.15.2 for Win64 - May 2023 Update (compatible with previous 5.15.2 binaries)
• Valve-Modified Qt 4.8.3 for Win64 (Source 2 Workshop Tools released before 2021)

To confirm the version of Qt being used, you can select "About Qt" from the Help menu in the Asset Browser or other tool windows.

List of Source games and software/tools that use Qt:

• Black Mesa
• Half-Life 2: Remastered
• Source Filmmaker

• SFM Qt SDK Launcher

• Strata Source
• Strata Hammer
• QtPyHammer

List of Source 2 games and software/tools that use Qt:

• Aperture Desk Job
• Dota 2
• Destinations ( SteamVR Home)
• Half-Life: Alyx
• The Lab
• Source 2 Filmmaker
• Asset Browser

• Hammer 5.x
• Material Editor
• Model Editor
• ModelDoc Editor
• Particle Editor
• Image Subrect Editor
• CS2 Workshop Item Editor
• Workshop Manager

External links

• Official Website for Qt
•  Wikipedia page about Qt