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Steam’s shader pre-caching can reduce stutter, but it can also use storage, network bandwidth, CPU time, and background disk activity. You can turn it off from the Steam desktop client. The setting is global, so Steam does not currently offer a standard per-game switch.
Disable shader pre-caching in the Steam desktop client
- Open the Steam desktop application.
- Select Steam in the upper-left corner.
- Choose Settings.
- Select Downloads from the left sidebar.
- Scroll down to the Shader Pre-Caching section.
- Clear the Enable Shader Pre-Caching checkbox.
- Close the Settings window.
If Steam already has a shader task queued, restart Steam completely after changing the setting. Exit the client from Steam → Exit, then open it again. This gives Steam a chance to discard or stop work that was scheduled before you disabled the feature.
Disable it on a Steam Deck
The normal Steam Deck Gaming Mode interface does not expose this setting. Use the desktop Steam client instead:
- Open the Steam Deck power menu and choose Switch to Desktop.
- Launch Steam in Desktop Mode.
- Go to Steam → Settings → Downloads.
- Scroll to Shader Pre-Caching.
- Clear Enable Shader Pre-Caching.
- Close Settings and return to Gaming Mode when finished.
Desktop Mode runs the regular desktop environment and Steam client, which is why the setting is available there even though it is not part of the usual Gaming Mode Downloads settings.
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What disabling shader pre-caching actually does
Steam’s pre-caching system downloads and processes hardware-independent shader or Vulkan pipeline data. The graphics driver can then prepare hardware-specific shader data before the game needs it. The aim is to reduce shader-compilation pauses and hitching during the first launch or while entering areas with new effects.
Clearing Enable Shader Pre-Caching prevents Steam from obtaining and processing those Steam-provided shader packages. It does not disable every shader cache on the computer. The following may continue to operate:
- Your graphics driver’s own shader cache.
- Proton, DXVK, or VKD3D-Proton caches on Linux and SteamOS.
- OpenGL or Vulkan caches.
- A cache created directly by the game.
- Shader compilation performed when the game starts or encounters a new effect.
As a result, disabling Steam’s feature does not guarantee that all shader-related disk or CPU activity will stop.
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What to do with “Allow background processing of Vulkan shaders”
On Linux and SteamOS, Steam may show a second option named Allow background processing of Vulkan shaders. This is not the main enable/disable control.
That option controls when Steam processes Vulkan shaders. With shader pre-caching still enabled, turning off background processing can make Steam wait until a game is launched before processing them. It does not shut down the pre-caching system.
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For a complete shutdown of Steam’s pre-caching subsystem, clear Enable Shader Pre-Caching. The background-processing option is secondary.
What changes after you turn it off?
| Possible result | Why it happens |
|---|---|
| Longer first launch or loading time | The game may compile shaders locally instead of using Steam’s prepared data. |
| More CPU activity at startup | Shader compilation is moved closer to the time you run the game. |
| Stuttering or hitching during play | New shaders may compile when an effect, material, or area is first displayed. |
| No obvious difference | The game or graphics driver may already handle shader caching effectively. |
The impact varies considerably by game, graphics API, driver, and hardware. If a particular game becomes noticeably less smooth, re-enable the setting and allow Steam to rebuild its shader data.
Does disabling it delete existing shader files?
No. The checkbox controls future Steam pre-caching; it should not be treated as a general cache-cleanup tool. Existing Steam shader data can remain on disk, and driver, Proton, DXVK, VKD3D-Proton, and game-specific caches are separate.
Steam shader data is commonly associated with a library path such as:
steamapps/shadercache/<AppID>The exact location depends on the Steam library containing the game. If the game is installed on a second drive or another library, its data may be stored there rather than in the default Steam installation.
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“Clear Download Cache” is a different function
Steam also provides Steam → Settings → Downloads → Clear Download Cache. That command clears Steam’s download cache and signs you in again. It is not documented as a universal tool for deleting Steam shader data, graphics-driver caches, or game-created shader files.
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Reset Steam’s pre-caching data instead
If your goal is to make Steam rebuild its shader-processing data rather than permanently disable the feature, Valve’s Linux Steam maintainer has described a different procedure: turn Enable Shader Pre-Caching off, then turn it on again.
This can reset the shader-pre-caching component and flush locally built game shaders handled by Fossilize. It may cause affected games to rebuild or reprocess shaders the next time they run. It is therefore unnecessary if you only want to stop future pre-caching.
Why shader activity may continue afterward
Steam may still show shader-related activity immediately after you clear the checkbox. Common explanations include:
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- A download or processing task was queued before you changed the setting.
- Steam has not been fully restarted.
- Steam is cleaning up or processing existing data rather than downloading new packages.
- The activity belongs to the game, Proton, DXVK, VKD3D-Proton, or the graphics driver.
- The game is compiling shaders in its own application-level cache.
- A driver update or cache invalidation has forced a rebuild.
Restart Steam first. If the activity appears only after launching a game, it is more likely to be local game or driver processing than a new Steam pre-cache download.
Is there a command-line option?
No command is required for the current supported Steam-wide procedure. The relevant control is the checkbox at Steam → Settings → Downloads → Shader Pre-Caching.
You may find the launch option -vulkan_disable_steam_shader_cache in older forum posts. It is associated mainly with particular Linux games and older community troubleshooting. Do not use it as the general replacement for the current global Steam setting.
Can shader pre-caching be disabled for only one game?
Not through Steam’s normal interface. Enable Shader Pre-Caching is a global client setting. Steam does not currently provide a standard per-game checkbox for this purpose.
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- Confirm that Enable Shader Pre-Caching, not only the background-processing option, is cleared.
- Exit Steam completely and relaunch it.
- Check whether the activity occurs before launching a game or only after launch.
- Remember that driver and game caches are independent of Steam’s cache.
- Re-enable the feature if disabling it causes persistent stutter or unusually long shader compilation.
For additional context, see Valve’s documentation and issue discussions on shader pre-caching controls, Steam Deck Desktop Mode, and clearing Steam’s download cache.
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FAQ
Where is Steam’s shader pre-caching setting?
Open the desktop Steam client and go to Steam → Settings → Downloads. Scroll to Shader Pre-Caching and clear Enable Shader Pre-Caching.
Can I change the setting in Steam Deck Gaming Mode?
No. Switch to Desktop Mode, open the regular Steam desktop client, and use Steam → Settings → Downloads.
Does disabling shader pre-caching delete shader caches?
No. It disables Steam’s pre-caching subsystem. Graphics drivers, games, Proton, DXVK, and VKD3D-Proton can still keep and create their own caches.
Should I disable background Vulkan shader processing too?
That option is not the master switch. Clear Enable Shader Pre-Caching to disable Steam’s pre-caching. Background processing only controls when Vulkan shader work occurs.
Why does Steam still show shader activity after I disable the feature?
A task may already be queued, Steam may need to be restarted, or the activity may come from an existing cache, the game, Proton, or the graphics driver rather than Steam’s pre-caching downloads.
Can I disable shader pre-caching for one game?
Steam’s standard interface does not provide a per-game control. The setting applies globally to the Steam client.
The Bottom Line
To disable Steam’s shader pre-caching, open Steam → Settings → Downloads, clear Enable Shader Pre-Caching, and restart Steam if necessary. This stops Steam’s own pre-caching system, but it does not disable game, Proton, or graphics-driver shader caches. Expect potentially longer first launches or more in-game stutter, especially when new effects are compiled locally.
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