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OptiScaler terms: OptiFG, proxy DLL, input and output

Short definitions: input upscaler, output upscaler, OptiFG, proxy DLL, Insert overlay, FSR4 and fallback paths.

OptiScaler terms: OptiFG, proxy DLL, input and output feature illustration

Download OptiScaler 0.9.4

What this hub is

Short definitions: input upscaler, output upscaler, OptiFG, proxy DLL, Insert overlay, FSR4 and fallback paths.

OptiScaler 0.9.4 is a community translation layer for DirectX 11, DirectX 12 and Vulkan games. This host is an independent guide, not the official project site. Start from Download, then come back here for the per-game checks.

The safe order

  1. Back up the game folder.
  2. Extract the ZIP next to the main game executable.
  3. Launch offline and press Insert.
  4. Change one output at a time, and never test in online or anti-cheat protected games.

Pages in OptiScaler terms

  • Input upscaler — The upscaler a game already exposes — DLSS, FSR, XeSS or another supported temporal path.
  • Output upscaler — The backend you select in the overlay to produce the final image.
  • OptiFG — OptiScaler's experimental frame generation for some DirectX 12 scenarios.
  • Insert overlay — The in-game OptiScaler configuration overlay, commonly opened with Insert.
  • Proxy DLL — The library name OptiScaler uses to load beside the game executable for that game and API.
  • FSR4 — AMD's newer ML upscaling generation, reachable in OptiScaler only on supported output/GPU/driver/game combinations.
  • INT8 / fallback path — The lower-precision or older-generation path used when full FSR4 requirements are not met.
  • Frame generation — Synthetic frames inserted between rendered frames to raise displayed frame rate.
  • OptiScaler INI — The per-game configuration file that stores OptiScaler options next to the game.
  • Sharpening — Post-upscale edge enhancement you can tune in the overlay.
  • Anti-cheat risk — Replaced or injected DLLs can be flagged in online and anti-cheat protected games.

Frequently asked questions

What is OptiScaler?

OptiScaler is a community tool that can intercept supported in-game upscaler calls and redirect them to another supported upscaling backend, with additional tuning options.

How does OptiScaler work in a game?

The game exposes an input upscaler, OptiScaler sits between the game and the selected output backend, and the chosen output handles the final upscaling path where compatibility allows.

Does OptiScaler support DirectX 11?

Yes, DirectX 11 is supported, although the available output methods and behavior can differ from DirectX 12.

Does OptiScaler support DirectX 12?

Yes. DirectX 12 has broad support and is also the API used by experimental OptiFG functionality.

Facts that do not change

  • Version: OptiScaler 0.9.4 (reference build, July 2026)
  • APIs: DirectX 11, DirectX 12, Vulkan
  • Upscalers: DLSS, FSR and XeSS inputs/outputs where compatible
  • Frame generation: Experimental OptiFG (DirectX 12)
  • Overlay: Insert key
  • Install: ZIP extracted next to the main game executable
  • Platform: Windows; Linux via Proton/Wine varies
  • Site: Independent guide — not the official project site

Practical Checklist

  • Keep original files backed up before changing the game folder.
  • Test one setting or backend at a time.
  • Avoid anti-cheat protected online sessions.
  • Document the working configuration before updating.
Independent guide: This site is not affiliated with OptiScaler or any other third-party platforms.

Related Guides

Continue with the related guides in the sidebar for setup, compatibility, performance, or safety topics.