Danger Sense

Ever walked straight into powder snow, or opened the one chest in the room that turned out to be trapped? The block was right there in front of you the whole time. You just did not clock it.

Client side mod only, for 1.21.11

What does this mean?

It marks the blocks that get people killed

• Everything here is already visible to your naked eye, the mod just makes sure you notice it
• Every single category can be flipped off if you do not care about it

Danger	Why it gets you	Default
Powder Snow	You fall right through it	On
Trapped Chests	Looks basically identical to a normal chest	On
Tripwire (String)	Nearly invisible trap trigger	On
Suspicious Sand and Gravel	Not really dangerous, just a pain to spot lol	On
TNT	Usually the punchline of somebody's trap	On
Sculk Shriekers	Summons the Warden, enough said	On
Magma Blocks	Burns you	Off

The overlay is the vanilla world border, borrowed

• Same texture, same scrolling animation, so it looks like it belongs in the game instead of bolted on
• It is emissive, which means it still reads clearly at night and deep in caves

It traces the actual shape of the block, not a lazy cube

• A thin strip for armed tripwire
• A chest shaped box for trapped chests
• A full cube for powder snow
• Touching blocks of the same type merge into one outline, so a powder snow field reads as a single blob instead of forty separate boxes

It fades in and out instead of popping

• Highlights ease in as you get closer and ease back out as you leave
• Break or replace a block and the highlight is gone instantly, no ghost outlines hanging around
• Scan radius is yours to set, anywhere from 4 to 32 blocks

Installation

It takes about a minute (or less)

• Grab the Fabric Loader from https://fabricmc.net/
• Grab the Fabric API from https://modrinth.com/mod/fabric-api, this one is required
• Grab Mod Menu from https://modrinth.com/mod/modmenu if you want the settings screen, optional but recommended
• Drop the dangersense jar into your mods folder

That is genuinely it. 🤯 (might take longer if you have no idea what you are doing)

Works on Minecraft 1.21.11.

Controls and settings

One key, and you are done

• Press V to toggle the overlay in game
• Rebindable, so put it wherever it does not clash with your setup

Everything else lives in Mod Menu

• Open Mods > Danger Sense and you get the whole panel
• Master toggle, scan radius, overlay opacity, animation speed, and a switch for every danger type
• No Mod Menu? Settings still work, they just live in config/dangersense.json and you edit them by hand

FAQ

Is this X-ray? Will I get banned?

• No. Every block it highlights is one you can already see with your own eyes
• It never looks through walls and never touches hidden or server side information
• It only uses data the server already sent your client, the same data used to draw the block on your screen

Does the server need this mod?

• No. Fully client side, works in singleplayer and on any server you join

Will it tank my FPS?

• Lower the scan radius if you are on a rough machine, that is the main lever
• Highlights are only calculated for blocks inside that radius, everything else is ignored entirely

Can I turn off just the annoying ones?

• Yes, every category has its own toggle
• Magma blocks are already off by default because most people find them obvious enough

License

Danger Sense is MIT licensed. Short version first, boring version after.

The short version

• Take the code, build whatever you want with it, commercial use included
• Just keep the copyright notice attached
• Credit is not required, but it is always nice to see

The boring version

MIT lets you use, modify and redistribute the code freely. The one condition is that the copyright notice and license text travel with any substantial copy of the source.

Made by ReimaginedPixel