Version: 2019.4
Unity Editor command line arguments
Batch mode and built-in coroutine compatibility

Unity Standalone Player command line arguments

You can launch Unity Players from the command line and pass in arguments to change how the Player executes.

Command Details:
-batchmode Run the application in “headless” mode. In this mode, the application doesn’t display anything or accept user input. This is useful for running servers for networked applications.
-disable-gpu-skinning Disables Graphics Processing Unit (GPU) skinningThe process of binding bone joints to the vertices of a character’s mesh or ‘skin’. Performed with an external tool, such as Blender or Autodesk Maya. More info
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at startup.
-force-clamped Use this together with -force-glcoreXY to prevent checks for additional OpenGL extensions, allowing the application to run between platforms with the same code paths.
-force-d3d11-singlethreaded Force DirectX 11.0 to be created with a D3D11_CREATE_DEVICE_SINGLETHREADED flag.
-force-device-index Make the Standalone Player use a specific GPU device by passing it the index of that GPU. This option is supported for D3D11, D3D12, Metal, and Vulkan graphics APIs, but isn’t supported for OpenGL.
-force-glcore Force the application to use the OpenGL core profile for renderingThe process of drawing graphics to the screen (or to a render texture). By default, the main camera in Unity renders its view to the screen. More info
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. The Editor tries to use the most recent OpenGL version available, and all OpenGL extensions exposed by the OpenGL drivers. Unity uses Direct3D if the platform doesn’t support OpenGL.
-force-glcoreXY Similar to -force-glcore, but requests a specific OpenGL context version. Accepted values for XY: 32, 33, 40, 41, 42, 43, 44, or 45.
-force-vulkan Force the application to use Vulkan for rendering.
-force-wayland (Linux only) Activate experimental Wayland support when running a Linux player.
-monitor N Run Standalone Player on the specified monitor, indicated by a 1-based index number.
-nographics When you use this argument in batch mode, Unity doesn’t initialize a graphics device. This makes it possible to run your automated workflows on machines that don’t have a GPU.
-nolog Do not produce an output log. When you don’t use this argument, Unity writes the output_log.txt in the Log Files folder, where the Debug.Log output is printed.
-no-stereo-rendering Turn off stereo rendering.
-popupwindow Create the window as a pop-up window, without a frame. This command isn’t supported on macOS.
-screen-fullscreen Override the default full-screen state. This must be 0 or 1.
-screen-height Override the default screen height. This must be an integer from a supported resolution.
-screen-width Override the default screen width. This width value must be an integer from a supported resolution.
-screen-quality Override the default screen quality. Example usage would be: /path/to/myGame -screen-quality Beautiful. The supported options match the Quality Settings names.
-vrmode <devicetype> Launch with a specific VR device. For more information, see Virtual RealityA system that immerses users in an artificial 3D world of realistic images and sounds, using a headset and motion tracking. More info
See in Glossary
.
-force-low-power-device (macOS only) Make the Standalone Player use a low power device.
-force-metal (macOS only) Make the Standalone Player use Metal as the default graphics API.
-force-d3d11 (Windows only) Force the application to use Direct3D 11 for rendering.
-force-d3d12 (Windows only) Force the application to use Direct3D 12 for rendering.
--parentHWND <HWND> delayed (Windows only) Embed the Windows Standalone application into another application. When you use this argument, you need to pass the parent application’s window handle (‘HWND’) to the Windows Standalone application.

When you pass -parentHWND 'HWND' delayed, the Unity application is hidden while it runs. You must also call SetParent from the Microsoft Developer library for Unity in the application. Microsoft’s SetParent embeds the Unity window. When it creates Unity processes, the Unity window respects the position and size provided as part of Microsoft’s STARTUPINFO structure.

To resize the Unity window, check its GWLP_USERDATA in Microsoft’s GetWindowLongPtr function. Its lowest bit is set to 1 when the graphics initialize and it’s safe to resize. Its second lowest bit is set to 1 after the Unity splash screen finishes displaying.

For more information, see this downloadable example: EmbeddedWindow.zip
-single-instance (Linux and Windows only) Run only one instance of the application at the time. If another instance is already running then launching the application again with -single-instance focuses the existing one.
-window-mode (Windows only) Override fullscreen windowed mode. Accepted values are exclusive or borderless. For more information, see Standalone Player settings.

Universal Windows Platform command line arguments

Universal Windows Apps don’t accept command line arguments by default, so to pass them you need to call a special function from MainPage.xaml.cs/cpp or MainPage.cs/cpp. For example:

appCallbacks.AddCommandLineArg("-nolog");

You should call this before the appCallbacks.Initialize() function.

Command Details:
-force-d3d11-singlethreaded Force DirectX 11.0 to be created with a D3D11_CREATE_DEVICE_SINGLETHREADED flag.
-force-driver-type-warp Force the DirectX 11.0 driver type WARP device. For more information, see Microsoft’s documentation on Windows Advanced Rasterization Platform.
-force-feature-level-9-3 Force DirectX 11.0 feature level 9.3.
-force-feature-level-10-0 Force DirectX 11.0 feature level 10.0.
-force-feature-level-10-1 Force DirectX 11.0 feature level 10.1.
-force-feature-level-11-0 Force DirectX 11.0 feature level 11.0.
-force-gfx-direct Force single threaded rendering.
-nolog Don’t produce UnityPlayer.log.
Unity Editor command line arguments
Batch mode and built-in coroutine compatibility