Embedded Linux Player settings reference

Embedded Linux Player settings lets you customize how Unity builds and displays your final application. To access the Player settings window for Embedded Linux, go to Edit > Project Settings > Player and select the Embedded Linux tab. You can use the PlayerSettings API to control most of the settings available in this window. For a description of the general Player settings, refer to Player SettingsSettings that let you set various player-specific options for the final game built by Unity. More info
See in Glossary.

General settings

The Player settings differ between the platform modules that you have installed. Each platform has its own Player settings which you must set for each version of your application you want to build. To navigate between them, click the tabs with the appropriate platform operating system icon.

You can find documentation for the properties in the following sections:

• Icon
• Resolution and Presentation
• Splash Image
• Other Settings

Icon

Enable the Override for Embedded Linux setting to assign a custom icon for your game.

Resolution and Presentation

Use the Resolution and Presentation section to customize aspects of the screen’s appearance in the Resolution section.

Resolution section

This section allows you to customize the screen mode and default size.

Property	Description
Fullscreen Mode	Choose the full-screen mode. This defines the default window mode at startup. This sets the default window mode at startup.
	Fullscreen Window	The application window fills the full-screen native resolution of the device. To fill the full-screen window, Unity scales the application contents. To match the aspect ratioThe relationship of an image’s proportional dimensions, such as its width and height. See in Glossary of the output device, Unity might add black bars to the rendered output so the content doesn’t stretch. This process is called letterboxing. In this mode, the navigation bar is always hidden.
	Windowed	The application uses a standard, non-full-screen, movable window. The size of the window depends on the application’s resolution. In this mode, the window is resizable by default. To disable this, disable Resizable Window.
Default is Native Resolution	Enable this option to make the game use the default resolution used on the target machine. This option is not available if Fullscreen Mode is set to Windowed.
Use 32-bit Display Buffer	Embedded Linux only supports 32-bit color buffers.
Disable Depth and Stencil	This feature is not supported on Embedded Linux.
Render Over Native UI(User Interface) Allows a user to interact with your application. Unity currently supports three UI systems. More info See in Glossary	Enable this option only if you want to force your app to render on top of the native iOSApple’s mobile operating system. More info See in Glossary or Android UI. For this setting to take effect, set your CameraA component which creates an image of a particular viewpoint in your scene. The output is either drawn to the screen or captured as a texture. More info See in Glossary’s Clear flags to use a solid color with an alpha value lower than 1.

Splash Image

Use the Virtual RealityVirtual Reality (VR) immerses users in an artificial 3D world of realistic images and sounds, using a headset and motion tracking. More info
See in Glossary Splash Image setting to select a custom splash image for Virtual Reality displays. For information on common Splash Image settings, refer to Splash Image Player settings.

Other Settings

This section allows you to customize a range of options organized into the following groups:

• Rendering
• Configuration

Rendering

Use these settings to customize how Unity renders your game for the Embedded Linux platform.

Property	Description
Color Space	Choose which color space Unity uses for rendering: Gamma or Linear. Refer to the Linear rendering overview for an explanation of the difference between the two.
	Gamma	Gamma color space is typically used for calculating lighting on older hardware restricted to 8 bits per channel for the framebuffer format. Even though monitors today are digital, they might still take a gamma-encoded signal as input.
	Linear	Linear color space rendering gives more precise results. When you select to work in linear color space, the Editor defaults to using sRGB sampling. If your Textures are in linear color space, you need to work in linear color space and disable sRGB sampling for each Texture.
Force SRGB blitA shorthand term for “bit block transfer”. A blit operation is the process of transferring blocks of data from one place in memory to another. See in Glossary	Enable this to use Force SRGB blit for Linear color space. If your graphics drivers don’t support the linear color space, selecting this option will convert Linear color space to Gamma (SRGB) color space.
Auto Graphics API	Enable this option to use the best Graphics API on the device the application is running on. Disable it to add and remove supported Graphics APIs.
Multithreaded Rendering	Enable this option to use multithreaded rendering.
Static BatchingA technique Unity uses to draw GameObjects on the screen that combines static (non-moving) GameObjects into big Meshes, and renders them in a faster way. More info See in Glossary	Enable this option to use Static batching.
Static Batching Threshold	Controls the maximum vertex threshold used when batching. For more information, refer to Sprite Batch Vertex Threshold.
GPU Compute 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 See in Glossary	Enable this option to enable DX11/ES3 GPU compute skinning, freeing up CPU resources.
Graphics Jobs	Enable this option to instruct Unity to offload graphics tasks (render loops) to worker threads running on other CPU cores. This is intended to reduce the time spent in Camera.Render on the main thread, which is often a bottleneck.
Texture compressionA method of storing data that reduces the amount of storage space it requires. See Texture Compression, Animation Compression, Audio Compression, Build Compression. See in Glossary format	Choose the texture compression3D Graphics hardware requires Textures to be compressed in specialized formats which are optimized for fast Texture sampling. More info See in Glossary format to use for textures in your Project. The options are ETC, ETC2, ASTC, DXT, and PVRTC. For more information on each of these compression formats, refer to TextureImporterOverride.
Normal MapA type of Bump Map texture that allows you to add surface detail such as bumps, grooves, and scratches to a model which catch the light as if they are represented by real geometry. See in Glossary Encoding	Choose Normal Quality or High Quality to set the lightmapA pre-rendered texture that contains the effects of light sources on static objects in the scene. Lightmaps are overlaid on top of scene geometry to create the effect of lighting. More info See in Glossary encoding. This setting affects the encoding scheme and compression format of the lightmaps.
Lightmap Streaming	Enable this option to load only the lightmap mipmaps as needed to render the current game Cameras. This value applies to the lightmap textures as they are generated. Note: To use this setting, you must enable the Texture Streaming Quality setting.
	Streaming Priority	Set the lightmap mip map streaming priority to resolve resource conflicts. These values are applied to the light map textures as they’re generated. Positive numbers give higher priority. Valid values range from –128 to 127.
Frame Timing Stats	Enable this option to gather CPU/GPU frame timing statistics.
OpenGL: ProfilerA window that helps you to optimize your game. It shows how much time is spent in the various areas of your game. For example, it can report the percentage of time spent rendering, animating, or in your game logic. More info See in Glossary GPU Recorders	Enable profiler recorders when rendering with OpenGL.
Virtual Texturing (Experimental)	Indicates whether to enable Virtual Texturing. Note: The Unity Editor requires a restart for this setting to take effect.
Load/Store Action Debug Mode	Highlights undefined pixelsThe smallest unit in a computer image. Pixel size depends on your screen resolution. Pixel lighting is calculated at every screen pixel. More info See in Glossary that might cause rendering problems on mobile platforms. This affects the Unity Editor Game view, and your built application if you select Development BuildA development build includes debug symbols and enables the Profiler. More info See in Glossary in Build Settings. Refer to LoadStoreActionDebugModeSettings for more information.
360 Stereo Capture	Indicates whether Unity can capture stereoscopic 360 images and videos. When enabled, Unity compiles additional shaderA program that runs on the GPU. More info See in Glossary variants to support 360 capture (currently only on Windows/macOS). When enabled, enable_360_capture keyword is added during the Stereo RenderCubemap call. Note that this keyword isn’t triggered outside the Stereo RenderCubemap function. For more information, refer to Stereo 360 Image and Video Capture.

Vulkan settings

Property	Description
SRGB Write Mode	Enable this option to allow Graphics.SetSRGBWrite() renderer to toggle the sRGB write mode during runtime. That is, if you want to temporarily turn off Linear-to-sRGB write color conversion, you can use this property to achieve that. Enabling this has a negative impact on performance on mobile tile-based GPUs; therefore, do NOT enable this for mobile.
Number of swapchain buffers	Set this option to 2 for double-buffering, or 3 for triple-buffering to use with Vulkan renderer. This setting may help with latency on some platforms, but in most cases you should not change this from the default value of 3. Double-buffering might have a negative impact on performance. Do not use this setting on Android.
Acquire swapchain image late as possible	If enabled, Vulkan delays acquiring the backbuffer until after it renders the frame to an offscreen image. Vulkan uses a staging image to achieve this. Enabling this setting causes an extra blit when presenting the backbuffer. This setting, in combination with double-buffering, can improve performance. However, it also can cause performance issues because the additional blit takes up bandwidth.
Recycle command buffers	Indicates whether to recycle or free after Unity executes them.

Configuration

Use this section to specify configuration settings for the Embedded Linux platform.

Property	Description
Scripting BackendA framework that powers scripting in Unity. Unity supports three different scripting backends depending on target platform: Mono, .NET and IL2CPP. Universal Windows Platform, however, supports only two: .NET and IL2CPP. More info See in Glossary	The scripting backend determines how Unity compiles and executes C# code in your application. The default scripting backend for Embedded Linux is IL2CPPA Unity-developed scripting back-end which you can use as an alternative to Mono when building projects for some platforms. More info See in Glossary.
API Compatibility Level	Choose which .NET APIs you can use in your project. This setting can affect compatibility with 3rd-party libraries.
	.Net Standard 2.0	Compatible with .NET Standard 2.0. Produces smaller builds and has full cross-platform support.
	.Net Framework 4.x	Compatible with the .NET Framework 4 (which includes everything in the .NET Standard 2.0 profile as well as additional APIs). Choose this option when usng libraries that access APIs not included in .NET Standard 2.0. Produces larger builds and any additional APIs available are not necessarily supported on all platforms. For more information, refer to Referencing additional class library assemblies.
C++ Compiler Configuration	Choose the C++ compiler configuration used when compiling IL2CPP generated code.
Use incremental GC	Enable this to use the incremental garbage collector, which spreads garbage collection over several frames to reduce gc-related spikes in frame duration.
Assembly Version Validation	This is an Editor setting that doesn’t apply in runtime.
Player Data path	Enter the directory path on the system where you want to save the .config and log files. You can also change this from the command line of the player by adding the following arguments:-platform-hmi-player-data-path <pathname>.
Enable Game ControllersA device to control objects and characters in a game. See in Glossary	When selected, this setting enables game controllers. You can disable this if you don’t need game controllers, to help reduce the player startup time.
CPU Configuration	Set the target CPU configuration for the player runtime. The default number of cores is 0, but you can increase it by entering a number. The options for each CPU are: Disabled, High Performance, and Low Performance.
Loading image	Use this setting to select a custom splash image for the loading screen.
Active Input Handling	Choose how you want to handle input from users.
	Input ManagerSettings where you can define all the different input axes, buttons and controls for your project. More info See in Glossary (old)	Use the default Input window.
	Input System (Preview)	Use the newer Input system. The Input System is provided as a preview packageA preview package is in development and not yet ready for production. A package in preview might be at any stage of development, from the initial stages to near completion. See in Glossary for this release. To try a preview of the Input System, install the InputSystem package.
	Both	Use both systems side-by-side.

Shader Settings and Shader Variant Loading Settings

Use these settings to control how much memory shaders use at runtime.

Property	Description
Shader precision model	Select the default precision of samplers used in shaders. For more information, refer to HLSL data types.
Strict shader variant matching	Use the error shader if a shader variant is missing and display an error in the console.
Keep Loaded Shaders Alive	When enabled, you can’t unload a shader. For more information, refer to Shader loading.
Default chunk size (MB)	Sets the maximum size of compressed shader variant data chunks Unity stores in your built application for all platforms. The default is 16. For more information, refer to Shader loading.
Default chunk count	Sets the default limit on how many decompressed chunks Unity keeps in memory on all platforms. The default is 0, which means there’s no limit.
Override	Enable this to override Default chunk size and Default chunk count for this build target.

Script Compilation

Property	Description
Scripting Define Symbols	Sets custom compilation flags. For more details, see Platform dependent compilation.
Additional Compiler Arguments	Adds entries to this list to pass additional arguments to the Roslyn compiler. Use one new entry for each additional argument. To create a new entry, click Add (+). To remove an entry, click Remove (-). When you have added all desired arguments, click Apply to include your additional arguments in future compilations. Click Revert to reset this list to the most recent applied state.
Suppress Common Warnings	Indicates whether to display the C# warnings CS0169 and CS0649.
Allow ‘unsafe’ Code	Enables support for compiling ‘unsafe’ C# code in a pre-defined assembly (for example, Assembly-CSharp.dll). For Assembly Definition Files (.asmdef), click on one of your .asmdef files and enable the option in the Inspector window that appears.
Use Deterministic Compilation	Indicates whether to prevent compilation with the -deterministic C# flag. With this setting enabled, compiled assemblies are byte-for-byte identical each time they are compiled. For more information, see Microsoft’s deterministic compiler option.
Enable Roslyn Analyzers	Indicates whether to compile user-written scriptsA piece of code that allows you to create your own Components, trigger game events, modify Component properties over time and respond to user input in any way you like. More info See in Glossary without Roslyn analyzer DLLs that might be present in your project.

Optimization

Property	Description
Prebake Collision Meshes	Adds collision data to Meshes at build time.
Preloaded Assets	Sets an array of Assets for the player to load on startup. To add new Assets, increase the value of the Size property and then set a reference to the Asset to load in the new Element box that appears.
Managed Stripping Level	Chooses how aggressively Unity strips unused managed (C#) code. When Unity builds your app, the Unity Linker process can strip unused code from the managed DLLs your Project uses. Stripping code can make the resulting executable smaller, but can sometimes remove code that’s in use. For more information about these options and bytecode stripping with IL2CPP, refer to ManagedStrippingLevel.
	Minimal	Use this to strip class libraries, UnityEngine, Windows Runtime assemblies, and copy all other assemblies.
	Low	Remove unreachable managed code to reduce build size and Mono/IL2CPP build times.
	Medium	Run UnityLinker to reduce code size beyond what Low can achieve. You might need to support a custom link.xml file, and some reflection code paths might not behave the same.
	High	UnityLinker will strip as much code as possible. This will further reduce code size beyond what Medium can achieve but managed code debugging of some methods might no longer work. You might need to support a custom link.xml file, and some reflection code paths might not behave the same.
Vertex Compression	Sets vertex compression per channel. This affects all the meshes in your project. Typically, Vertex Compression is used to reduce the size of mesh data in memory, reduce file size, and improve GPU performance. For more information on how to configure vertex compression and limitations of this setting, refer to Compressing mesh data.
Optimize Mesh Data	Enable this option to strip unused vertex attributes from the mesh used in a build. This option reduces the amount of data in the mesh, which can help reduce build size, loading times, and runtime memory usage. Warning: If you have this setting enabled, don’t change material or shader settings at runtime. For more information, refer to PlayerSettings.stripUnusedMeshComponents.
Texture MipMap Stripping	Enables mipmap stripping for all platforms. It strips unused mipmaps from Textures at build time. Unity determines unused mipmaps by comparing the value of the mipmap against the quality settings for the current platform. If a mipmap value is excluded from every quality setting for the current platform, then Unity strips those mipmaps from the build at build time. If QualitySettings.masterTextureLimit is set to a mipmap value that has been stripped, Unity will set the value to the closest mipmap value that hasn’t been stripped.

Logging

Select what type of logging you want to allow for Embedded Linux builds.

• Select your preferred logging method from the available options.

• Check a box that corresponds to each Log Type (Error, Assert, Warning, Log, and Exception) based on the type of logging you require. For example:

  • ScriptOnly - Logs only when running scripts.
  • Full - Logs all the time.
  • None - No logs are ever recorded.

Legacy

This section covers the legacy player settings.

Property	Description
Clamp BlendShapes (Deprecated)	Enable the option to clamp the range of blend shape weights in SkinnedMeshRenderers.
Upload Cleared Texture Data	This is a legacy feature and currently not needed because it uses up the bandwidth. By default, this is enabled for debugging purposes. Enabling this setting clears the initial data and automatically uploads the texture from script to the video memory.

Additional resources:

• Player settings
• IL2CPP overview