The "Add-On" system (introduced in 5.0) allows developers to write custom C++ code for ReShade without touching the core injector. 5.9.1 adds 17 new event hooks for add-on creators, including on_create_texture and on_bind_framebuffer, allowing for deeper mods like dynamic HUD masking.
Previous versions sometimes struggled with loading orders on older GPUs. 5.9.1 introduces a more robust runtime compiler that reduces stuttering when you toggle effects on/off. Early testing shows a 12-15% reduction in loading times for effect compilation on large preset files. reshade 5.9 1
If you’re already on ReShade 5.9.0, the update to 5.9.1 is a no-brainer—it’s a free, seamless upgrade that only improves stability. For those still on much older versions (e.g., 4.x or early 5.x), you’ll benefit from the entire 5.9 feature set, including: The "Add-On" system (introduced in 5