The fastflags in Roblox acts as a feature flag for the platform, this feature allows the developer to modify how the game engine or client components work without client updates. They control the default sections of code within the Roblox client, enabling users to specify values, enable features, or ignore them entirely. Although primarily managed inline by Roblox, and users can manually adjust Fast Flags to customize their Roblox experience. Bloxstrap makes this process easy with a user-friendly fastflags editor.
For a complete list of existing fastflags, see argued Fastvariable or Roblox’s official client settings arrangement list.
Important Note:
FastFlags are powerful tools designed for Roblox engineers, if misused they can cause a lot of problems. The FastFlags Editor should only be used when you have a good understanding of the function of each flag. Avoid including large lists of flags as this can affect stability and functionality. If you are having problems with Roblox, try removing manually configured flags first.
Preset FastFlags in Bloxstrap
Bloxstrap already has several fastflags, which help to manage their settings.
Exclusive Fullscreen
Relevant flag(s): FFlagHandleAltEnterFullscreenManually
This preset, always enabled by default, agrees to you to use Direct 3D’s special full-screen mode with Alt+Inter instead of F1. Vulcan always uses special fullscreen. If pressing Alt+Tab makes Roblox flash black or go full screen, it indicates that you are using special fullscreen mode.
You may run into some issues with the exclusive fullscreen mode which are given below:
- It can limit the framerate regardless of the settings.
- Your mouse cursor may not be visible on the screen.
- Embedded browsers may not appear.
DPI Scaling Fixes
Relevant flag(s):DFFlagDisableDPIScale
This preset has screen scaling greater than 100% to compensate for Roblox’s reduced graphic quality. For example at 4k resolution with a scale of 300%, enabling this flag maintains high visual quality. If performance or battery life is your priority, you may choose not to enable it.
Framerate Limit
Relevant flag(s): DFIntTaskSchedulerTargetFps
By default, Roblox controls the framerate at 60 fps. This flag helps you adjust your limits. Setting it to zero disables the custom hand and reverts to the standard 60 fps cap. Bloxstrap will match the framerate range of your fastest display. There is usually no need to change this unless you want to disable it. However, increase in frame rate limits is possible:
- Increase network latency.
- Source crashes when teleporting or linking games.
Some games rely on a certain frame rate for timing, so it is batter not to set it higher than 240 fps. If you experience any issue in the game, reset the frame rate limit to zero to return to the default setting.
Preferred Lighting Technology
Roblox offers a variety of lighting technologies, each new version of which usually improves visual quality but potentially affects performance. Developers can use older techniques to support less powerful hardware. If your device’s hardware allows it, you can use Lighting technologies for better visuals.
Important Note: Changing the game’s lighting technology can cause in-camera rendering problems (such as too light or too dark). If you face such issues within the game, please reset the game to default settings.
Escape Menu Version
If you have Chrome UI newer than Roblox, you have the version four menu enabled by default. Paste the given json configuration into the flag editor to disable it.
colonoscopy code { “FFlagEnableInGameMenuChromeABTest2”: “False”,“ FFlagEnableReportAbuseMenuRoactABTest2”: “False” }
Relevant flag(s): FFlagDisableNewIGMinDUA, FFlagEnableInGameMenuControls.
Roblox no longer supports menu versions older than 2023, which may cause some buttons and controls to breakdown, as well as minor visual or usability issues.
GUI Hiding
Relevant flag(s): DFIntCanHideGuiGroupId
You must be a member of a Roblox group to use this group-based fastflags. Check out the flag editor for instructions. You can join the Bloxstrap group for convenience.
- Ctrl + Shift + B: Toggles the 3D space GUIs.
- Ctrl + Shift + C: Toggles the game-defined screen Guis.
- Ctrl + Shift + C: Toggles Roblox CoreGuis.
- Ctrl + Shift + N: Toggle player names and other billboard GUIs above the player.
Pro Tip: Ctrl + Shift + G + C + N use to take a clear screenshot.
Old Material Textures
Relevant flag(s): FStringPartTexturePackTable2022
Roblox plans to remove this flag, making this opportunity potentially useless in the future. If you are having problems with the old build, add the json code below to the flag editor:
jsonCopy code { “FFlagMSRefactor5”: “False” }
This option restores content used before 2022 but may be removed in a future bloxstrap update.