---
title: "OptiScaler Linux guide | OptiScaler"
description: "Understand OptiScaler Linux usage through Proton or Wine, Vulkan and DirectX translation, driver requirements, prefixes, and practical troubleshooting."
canonical: https://optiscaler.ink/guides/linux-proton-guide
updated: 2026-10-18
---

# OptiScaler Linux guide: Proton, Vulkan and setup considerations

Understand OptiScaler Linux usage through Proton or Wine, Vulkan and DirectX translation, driver requirements, prefixes, and practical troubleshooting.

## 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

## In short

Understand OptiScaler Linux usage through Proton or Wine, Vulkan and DirectX translation, driver requirements, prefixes, and practical troubleshooting.

## Steps

1. Install the game through Steam Proton or a Wine prefix first and confirm it runs stock.

2. Place the OptiScaler files next to the main game executable inside the prefix, same as Windows.

3. Launch and press Insert; if the overlay is missing, re-check the folder and proxy name before changing Proton versions.

4. Expect Vulkan, driver and upscaler requirements to differ from Windows; test one output at a time.

## Facts that do not change

Reference build is OptiScaler 0.9.4. Install is a ZIP next to the main game executable; the overlay opens with Insert. Avoid online or anti-cheat protected games, and test offline first.

## 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)
- [OptiScaler FAQ: the official 20 questions, answered](https://optiscaler.ink/faq)
- [OptiScaler install guide: clean setup from start to finish](https://optiscaler.ink/guides/install-optiscaler-clean-setup)
- [How OptiScaler works: input, output and overlay explained](https://optiscaler.ink/guides/how-optiscaler-works-input-output)
- [OptiScaler compatibility guide for DirectX 11, DirectX 12 and Vulkan](https://optiscaler.ink/guides/compatibility-dx11-dx12-vulkan)

## Download

ZIP next to the game executable: [Download OptiScaler](https://optiscaler.ink/download)

Markdown mirror: https://optiscaler.ink/guides/linux-proton-guide.md