--- title: "OptiScaler FAQ | OptiScaler" description: "Standalone URLs for the official site's 20 OptiScaler questions — APIs, overlay, FSR4, Linux, anti-cheat and the manager question." canonical: https://optiscaler.ink/faq updated: 2026-10-18 --- # OptiScaler FAQ: the official 20 questions, answered Standalone URLs for the official site's 20 OptiScaler questions — APIs, overlay, FSR4, Linux, anti-cheat and the manager question. ## Facts (2026-10-18) - **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 ## What this hub is Standalone URLs for the official site's 20 OptiScaler questions — APIs, overlay, FSR4, Linux, anti-cheat and the manager question. 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](https://optiscaler.ink/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 FAQ - [What is OptiScaler?](https://optiscaler.ink/faq/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?](https://optiscaler.ink/faq/how-does-optiscaler-work) — 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?](https://optiscaler.ink/faq/directx-11-support) — Yes, DirectX 11 is supported, although the available output methods and behavior can differ from DirectX 12. - [Does OptiScaler support DirectX 12?](https://optiscaler.ink/faq/directx-12-support) — Yes. DirectX 12 has broad support and is also the API used by experimental OptiFG functionality. - [Does OptiScaler support Vulkan?](https://optiscaler.ink/faq/vulkan-support) — Yes, Vulkan support exists, but individual upscalers and games can require specific compatibility conditions. - [Can OptiScaler replace DLSS with FSR or XeSS?](https://optiscaler.ink/faq/replace-dlss-with-fsr-or-xess) — In compatible games, it can redirect supported DLSS-style inputs to another supported output such as FSR or XeSS. - [Can OptiScaler replace FSR inputs?](https://optiscaler.ink/faq/replace-fsr-inputs) — Many FSR input paths can work, but game-specific implementations vary, especially with older or custom FSR integrations. - [Does OptiScaler include frame generation options?](https://optiscaler.ink/faq/frame-generation-options) — It can manage supported frame generation paths, and experimental OptiFG can add frame generation in some DirectX 12 scenarios. - [What key opens the OptiScaler overlay?](https://optiscaler.ink/faq/overlay-key) — Insert is commonly used to open the overlay. Some keyboard layouts may need an alternate combination depending on the game and configuration. - [Is OptiScaler Manager an official separate app?](https://optiscaler.ink/faq/manager-official-app) — Be cautious with manager-style tools. Verify software sources carefully and do not assume a third-party manager or client is part of the core OptiScaler project. - [How do I install OptiScaler?](https://optiscaler.ink/faq/how-to-install) — Extract the required files beside the main game executable and follow the setup method suitable for that game. Always back up replaced files first. - [Should I use OptiScaler in online games?](https://optiscaler.ink/faq/online-games) — Avoid using it in online or anti-cheat protected games because injected or replaced files can be flagged and may create account risk. - [Why does the OptiScaler overlay not appear?](https://optiscaler.ink/faq/overlay-not-appear) — Common causes include an incorrect install folder, the wrong proxy DLL, input-hook conflicts, overlays, or a game-specific compatibility issue. - [Why does a game crash after installation?](https://optiscaler.ink/faq/game-crash-after-install) — Remove the added files to confirm the cause, then check the correct game executable folder, proxy selection, API support, and known compatibility limitations. - [Can I use OptiScaler on Linux?](https://optiscaler.ink/faq/linux-use) — Linux use is possible in supported configurations, commonly through Proton or Wine, but Vulkan, driver, and upscaler requirements can differ from Windows. - [What is OptiScaler FSR4 support?](https://optiscaler.ink/faq/fsr4-support) — FSR4 support depends on the selected output path, GPU capability, driver or SDK behavior, and game compatibility. Unsupported hardware may fall back to another path. ## FAQ ### 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. ## Related - [OptiScaler guides: install, FSR4, Linux, performance and safety](https://optiscaler.ink/guides) - [What is OptiScaler?](https://optiscaler.ink/faq/what-is-optiscaler) - [How does OptiScaler work in a game?](https://optiscaler.ink/faq/how-does-optiscaler-work) - [Does OptiScaler support DirectX 11?](https://optiscaler.ink/faq/directx-11-support) - [Does OptiScaler support DirectX 12?](https://optiscaler.ink/faq/directx-12-support) - [Does OptiScaler support Vulkan?](https://optiscaler.ink/faq/vulkan-support) ## Download ZIP next to the game executable: [Download OptiScaler](https://optiscaler.ink/download) Markdown mirror: https://optiscaler.ink/faq.md