Bloxstrap Fast Flags (2026): FPS Boost, Low Ping & Best Configs Explained

Best Bloxstrap Fast Flags for FPS Boost

Frame rate is where most players start, and for good reason. Roblox’s default launcher caps FPS at 60, which feels sluggish on monitors that support higher refresh rates. These flags remove that cap and help the frame scheduler run more efficiently.

Unlock the FPS Cap

{
  "DFIntTaskSchedulerTargetFps": "240"
}

Set this to match your monitor’s refresh rate — 144 for a 144Hz display, 165 for a 165Hz panel, or 240 if your setup supports it. Setting it to 9999 is possible but can cause instability on some systems, so targeting your actual display cap is the smarter choice.

Full Performance Configuration

{
  "DFIntTaskSchedulerTargetFps": "240",
  "FFlagDebugGraphicsDisableDirect3D11": "False",
  "DFIntServerPhysicsUpdateRate": "60",
  "DFIntServerTickRate": "60",
  "FFlagDisablePostFX": "True",
  "FIntRenderShadowIntensity": "0",
  "FFlagDisablePlayerShadows": "True"
}

This combination raises the FPS ceiling, keeps physics and tick rates synchronized at 60Hz, and removes shadow rendering along with post-processing effects — which are two of the heaviest graphical loads in Roblox.

For mid-range PCs, this configuration alone can produce a noticeably smoother experience, particularly in busy games with many characters and effects on screen.

Best Fast Flags for Low Ping

Ping reduction through Fast Flags works by adjusting how Roblox handles packet timing, interpolation, and network prediction. These are not magic fixes — your actual connection quality matters most — but they can reduce the effect of network jitter and stabilize packet flow.

Basic Low-Latency Setup

{
  "DFIntConnectionMTUSize": "900",
  "DFIntRakNetResendRttMultiple": "1",
  "DFIntOptimizePingThreshold": "50",
  "DFIntNetworkLatencyTolerance": "1"
}

DFIntConnectionMTUSize reduces the packet size, which can lower the chance of packet fragmentation on congested connections. DFIntRakNetResendRttMultiple controls how aggressively lost packets are resent.

Faster Replication Setup

{
  "DFIntPlayerNetworkUpdateRate": "60",
  "DFIntNetworkPrediction": "120"
}

These flags increase how frequently your position and state are sent to the server and how far ahead prediction runs, which can make movement feel more responsive in fast-paced games.

Fast Flags for No Textures (Low GPU Load)

On older hardware, textures are one of the biggest performance killers. Removing them entirely — or replacing them with flat colors — can make a dramatic difference in frame stability.

{
  "FStringPartTexturePackTable2022": "{\"glass\":{\"ids\":[\"rbxassetid://9873284556\",\"rbxassetid://9438453972\"],\"color\":[254,254,254,7]}}",
  "FStringPartTexturePackTablePre2022": "{\"glass\":{\"ids\":[\"rbxassetid://7547304948\",\"rbxassetid://7546645118\"],\"color\":[254,254,254,7]}}",
  "FStringTerrainMaterialTable2022": "",
  "FStringTerrainMaterialTablePre2022": ""
}

This replaces standard part textures with a flat glass-like surface and strips terrain material textures entirely. The game becomes less visually detailed but significantly lighter on GPU memory.

Fast Flags for Low Graphics Quality

If you want to lower graphics quality beyond what the in-game slider allows, these flags give you finer control.

Override Graphics Quality Level

{
  "DFIntDebugFRMQualityLevelOverride": "1"
}

The FRM levels work as follows:

• Level 1 — Ultra Low
• Level 2 — Low
• Level 3 — Medium

Additional Graphics Reduction Flags

{
  "FIntRenderShadowIntensity": "0",
  "FFlagDisablePostFX": "True",
  "FFlagDisablePlayerShadows": "True",
  "FFlagDisableGrass": "True",
  "FFlagDisableWind": "True",
  "FIntTerrainArraySliceSize": "4",
  "FIntLightUpdateLimit": "1"
}

Each of these targets a specific rendering pass. Disabling grass and wind removes animated geometry calculations. Reducing the terrain array slice size lowers the quality of terrain texture blending. Setting light update limit to 1 reduces how often dynamic lighting recalculates.

Rendering API Flags

Roblox supports multiple graphics APIs, and switching between them can affect performance depending on your GPU and drivers.

Vulkan — Generally faster on modern AMD and NVIDIA cards with recent drivers:

{ "FFlagDebugGraphicsPreferVulkan": "True" }

OpenGL — Useful as a fallback on older hardware where DirectX causes issues:

{ "FFlagDebugGraphicsPreferOpenGL": "True" }

DirectX 10 — For older GPUs that do not fully support DX11:

{ "FFlagDebugGraphicsPreferD3D10": "True" }

Metal (macOS only):

{ "FFlagUseMetal": "True" }

Try Vulkan first if you are on a dedicated GPU. Revert to the default (DX11) if you experience crashes or visual glitches.