Cubes Without Borders

A mod that allows you to play Minecraft in a borderless fullscreen window. This means you can keep the game open while interacting with other applications on a different monitor, or even directly on top of Minecraft itself, without the game being minimized.

Unlike other "borderless fullscreen" mods, Cubes Without Borders is highly configurable, does not hinder your input latency, and explicitly supports all major platforms - Linux, macOS, and even Windows - instead of providing a passable experience for only one group of players while making it seem as though others do not exist.

Usage

To enable borderless fullscreen, go to the Video Settings tab, where you would typically find the Fullscreen setting, and switch it to the newly added third option: Borderless.

Depending on whether you have Sodium installed, you may find this option in one of the following locations:

Additionally, the mod introduces a --borderless startup flag that forces the game to launch in the borderless fullscreen mode, regardless of your current settings.

FAQ

Config

The mod provides a simple configuration screen that can be accessed if you have YACL or Cloth Config installed:

Otherwise, you can configure it by directly editing the cwb.json file, stored in your mod loader's default configuration directory:

{
    // Specifies whether the game should start in windowed, exclusive fullscreen,
    // or borderless fullscreen mode.
    //
    // Should be one of: "OFF", "ON", or "BORDERLESS".
    "fullscreenMode": "OFF",

    // Specifies whether the game should enter exclusive or borderless fullscreen mode
    // when a player attempts to switch to fullscreen using a keybinding (e.g., F11).
    //
    // Should be either "ON", or "BORDERLESS".
    "preferredFullscreenMode": "BORDERLESS",

    // Specifies whether to postpone entering fullscreen mode until Minecraft is fully loaded.
    //
    // Enabling this option may result in a smoother startup sequence and can fix rare issues
    // on systems with faulty drivers that do not immediately allow certain windows to enter
    // fullscreen mode at a resolution that differs from the default one.
    "useDelayedFullscreen": true,

    // Specifies whether to use a full-resolution framebuffer on platforms where
    // screen coordinates can be scaled relative to pixel coordinates, such as
    // macOS and Wayland (Linux).
    //
    // Disabling this option may lead to a significant performance boost
    // at the cost of image quality.
    "useScaledFramebuffer": true,

    // When "pauseOnLostFocus" is enabled, specifies whether its effect should
    // also apply to multiplayer sessions, where the game cannot be truly paused.
    //
    // Note: "pauseOnLostFocus" is a vanilla option, and should be
    // looked for in the standard "options.txt" file.
    "pauseOnLostFocusDuringMultiplayer": true,

    // Controls which fullscreen mode is enabled when
    // "fullscreenMode" is set to "ON".
    "fullscreenType": "minecraft:default",

    // Controls which fullscreen mode is enabled when
    // "fullscreenMode" is set to "BORDERLESS".
    "borderlessFullscreenType": "minecraft:hybrid",

    // Provides configuration overrides for the Linux operating system.
    // Properties defined within this section take precedence over
    // their top-level counterparts.
    "linux": {
        "borderlessFullscreenType": "linux:borderless"
    },

    // Provides configuration overrides for the macOS operating system.
    // Properties defined within this section take precedence over
    // their top-level counterparts.
    "macos": {
        "borderlessFullscreenType": "macos:borderless"
    },

    // Provides configuration overrides for the Windows operating system.
    // Properties defined within this section take precedence over
    // their top-level counterparts.
    "windows": {
        "borderlessFullscreenType": "minecraft:windowed"
    }
}

Fullscreen Types

License

Licensed under the terms of the MIT License.