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Cubes Without Borders

Cubes Without Borders

Mod

Allows you to play Minecraft in a borderless fullscreen window.

Client OptimizationUtility

19.25M downloads
2,032 followers
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4.0.4+26.1

by Kira-NT on May 24, 2026
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Features

  • Improved mod loader detection logic for players using custom client branding (#122)
  • Added Estonian translations (#124)

Fixes

  • Fixed a mysterious issue where Minecraft would crash when exiting borderless fullscreen mode on macOS 26.3+ (#118)

New Contributors

  • @Madis0 made their first contributions in #118 and #124

Full Changelog: v4.0.3...v4.0.4

4.0.3+26.1

by Kira-NT on May 15, 2026
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Features

  • Updated translations for zh_tw, zh_cn, zh_hk, ms_my, and zlm_arab (#111, #112, #114)

Fixes

  • Fixed an issue where inputs could become misaligned on launch on macOS (#120)
  • Fixed a vanilla bug where inputs could become misaligned when switching to the Current resolution in exclusive fullscreen mode on macOS (#120)

New Contributors

  • @OneSitos made their first contribution in #114

Full Changelog: v4.0.2...v4.0.3

4.0.2+26.1

by Kira-NT on Apr 14, 2026
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Fixes

  • Fixed Quilt support for all five Quilt players out there

Full Changelog: v4.0.1...v4.0.2

4.0.1+26.1

by Kira-NT on Apr 13, 2026
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Fixes

  • Fixed missing window decorations upon exiting windows:windowed (#107)
  • Bypassed common annoyances with Nvidia drivers on Windows

Full Changelog: v4.0.0...v4.0.1

4.0.0+26.1

by Kira-NT on Apr 12, 2026
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Features

  • Added support for YetAnotherConfigLib to provide a more polished configuration screen experience
  • Added a new fullscreen type, minecraft:hybrid, which wraps the newly introduced non-exclusive fullscreen mode in vanilla 26.1
    • It's unclear to me why anyone would want this over true borderless fullscreen, but it's there
  • Removed the Exclusive Fullscreen button from the vanilla settings
  • Added support for OS-specific configurations via new linux, macos, and windows entries; their contents take precedence over top-level properties
  • Added a new Use Scaled Framebuffer option, allowing players to opt-out of using the full-resolution framebuffer on macOS and Wayland (#71)
    • This option is very similar to Reduce Resolution on macOS provided by Sodium Extra, which you should generally avoid due to its broken and artificially limited implementation
  • Added a new Pause on Lost Focus (Multiplayer) option, allowing players to disable automatic pausing when the window loses focus in multiplayer, while preserving the original behavior in singleplayer worlds (#99)
  • Added partial translations for zh_tw, zh_cn, ms_my, and zlm_arab (#41, #45, #67)

Fixes

  • Set minecraft:windowed as the default fullscreen mode on Windows (#40, #47, #59, #60, #70, #78, #97)
  • Fixed an issue where Minecraft would automatically minimize itself on macOS 10.15 (Catalina) and earlier (#61)
  • Removed the faint Liquid Glass border painted around the window on macOS 26 (Tahoe) and newer (#93)
  • Disabled the Windows-specific code path for restoring window size and position (#46, #92)
  • Removed the software scaler used by some borderless modes to simulate video modes with dimensions smaller than the default (#38, #44, #48, #51, #53, #54, #57, #66, #91, #96)
    • There were too few performance gains, if any, to justify its existence, given the number of compatibility issues it introduced with other mods

Breaking Changes

  • Changed the mod ID to cwb
    • This also means that configurations from previous versions will be invalidated
  • Removed windows:exclusive in favor of minecraft:windowed
  • Changed the format of translation strings

New Contributors

  • @NuruddinPlays made their first contribution in #41
  • @notlin4 made their first contribution in #45
  • @eirv made their first contribution in #67

Full Changelog: v3.0.0...v4.0.0

3.0.0+1.21.11

by Kira-NT on Dec 30, 2025
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3.0.0+1.21.11

by Kira-NT on Dec 30, 2025
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Features

  • Added support for NeoForge
  • Added support for Sodium 0.6.0-beta (#30)
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32
  • @BluSpring made their first contribution in #87

Full Changelog: 3.0.0+1.21.5...3.0.0+1.21.11

Features

  • Added support for NeoForge
  • Added support for Sodium 0.6.0-beta (#30)
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32

Full Changelog: 2.1.1+1.21...3.0.0+1.21.5

3.0.0+1.21.3

by Kira-NT on Oct 29, 2024
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3.0.0+1.21.3

by Kira-NT on Oct 29, 2024
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3.0.0+1.21.3

by Kira-NT on Oct 29, 2024
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Features

  • Added support for Forge
  • Added support for NeoForge
  • Added support for Sodium 0.6.0-beta (#30)
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32

Full Changelog: 2.1.1+1.21...3.0.0+1.21.3

3.0.0+1.21.2

by Kira-NT on Oct 29, 2024
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3.0.0+1.21.2

by Kira-NT on Oct 29, 2024
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Features

  • Added support for NeoForge
  • Added support for Sodium 0.6.0-beta (#30)
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32

Full Changelog: 2.1.1+1.21...3.0.0+1.21.2

3.0.0+1.21

by Kira-NT on Oct 29, 2024
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3.0.0+1.21

by Kira-NT on Oct 29, 2024
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3.0.0+1.21

by Kira-NT on Oct 29, 2024
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Features

  • Added support for Forge
  • Added support for NeoForge
  • Added support for Sodium 0.6.0-beta (#30)
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32

Full Changelog: 2.1.1+1.21...3.0.0+1.21

3.0.0+1.20.6

by Kira-NT on Oct 29, 2024
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3.0.0+1.20.6

by Kira-NT on Oct 29, 2024
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3.0.0+1.20.6

by Kira-NT on Oct 29, 2024
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Features

  • Added support for Forge
  • Added support for NeoForge
  • Implemented a configuration screen
  • Added a simpler way to access the Pause On Lost Focus option through the said configuration screen (#35)
  • Introduced software scaling to replace the screen resolution setting when it's unavailable; e.g., on macOS, Linux, or when the window is in borderless fullscreen mode (#25)
  • Enhanced fullscreen settings on macOS to better align with expected borderless fullscreen capabilities (#23)

Fixes

  • Reverted the default borderless fullscreen mode on Windows to windows:windowed (#14, #21, #22, #27, #28)

New Contributors

  • @Radk6 made their first contribution in #26
  • @301haru made their first contribution in #32

Full Changelog: 2.1.1+1.20...3.0.0+1.20.6

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Kira-NT

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