FreeSpace 2 Open (FSO), the open-source engine for the space classic FreeSpace 2, has been released in version 26.0.1.
Following version 26.0.0 in July, this release mainly brings a new Vulkan rendering backend with HDR10 output and raytraced shadows, a switch to SDL3, and numerous improvements for FRED/QtFRED and the AI.
Features & Improvements:
- Add Vulkan rendering backend, with HDR10 output and raytraced shadows
- Port to SDL3
- Remove the ship class limit and the weapon class limit
- Add event and message reordering to the FRED event editor
- Add a Reorder Ships and Wings editor to FRED
- QtFred: follow system theme mode, improved keyboard shortcuts and layer updates
- Improve support for gamepads
- Add text-to-speech Lua API to briefing/debrief/tech room UI sections
- Add command-line option overrides to options system
Bug Fixes:
- Fix various multi (multiplayer) bugs
- Fix AI ships getting permanently stuck after losing or refusing a target
- Fix heap overrun in texture readback for the model transparency scan
- Fix deferred lighting on Vulkan
- Fix crash when a ship with no primary banks is ordered to disable/disarm
- Fix Campaign Editor Crash
- Fix three memory leaks and make the debug leak check accurate
Builds are available for Linux (x86_64 and arm64), Windows and macOS.

Source: GitHub