Trial Vault ESP

Trial Vault ESP is a client-side Fabric mod for Minecraft 26.2 that helps you fully clear a Trial Chamber by highlighting Trial Vaults you haven't unlocked yet and showing you the live state of every Trial Spawner — all through walls, floors, and rubble.

What it does

Trial Chambers can span dozens of rooms, and it's easy to walk right past a vault or lose track of which spawners are still going. This mod scans the chamber around you and draws a colored wireframe box around:

Trial Vaults (unopened only):

🟦 Cyan — regular Trial Vault (opened with a Trial Key)
🟪 Purple — Ominous Trial Vault (opened with an Ominous Trial Key)

Trial Spawners:

🟢 Green — active, ejecting_reward, waiting_for_players, or waiting_for_reward_ejection (could still produce mobs right now)
🟠 Orange — cooldown following a normal trial
🔴 Red — cooldown following an ominous trial
⬛ Black — inactive (no mob set)

Vaults you've already claimed the reward from are automatically filtered out, so the vault ESP only ever shows what's left to do.

How it activates

Height-gated: the ESP only draws while you're below a configurable Y level (default 10, roughly Trial Chamber depth) — or, if you enable Always active in the settings, at any height.
Configurable radius: shows everything within a radius you set yourself, from 200 up to 500 blocks.

Accurate "already opened" vault detection

Singleplayer / LAN worlds: 100% accurate. The mod reads the real reward data directly from your world, the same data the server uses to decide whether you're eligible for loot.
Other people's multiplayer servers: a server never tells your client which vaults it has already rewarded you for, so the mod tracks this itself instead — every vault you successfully open while the mod is running is remembered (per server, saved to disk). The one limitation this can't get around: vaults you opened before installing the mod won't be known automatically.

Manual override for vaults

For vaults the mod couldn't know about (opened before installation, on a server), you can mark them yourself, two ways — both work instantly and are toggles (mark again to undo):

Shift + middle-click (mouse wheel press) on the vault
A dedicated keybind under Options → Controls → "Mark looked-at vault as opened" (unbound by default)

In-game settings

Trial Vault ESP integrates with ModMenu, giving you a config screen with:

Enabled — master on/off switch for the whole mod
Spawner ESP enabled — separate switch just for the spawner overlay
Always active — ignore the height limit
Max player Y — height threshold slider (-64 to 320)
Radius — visibility range slider (200 to 500 blocks)
Shift-middle-click marks vaults as opened — toggle for the manual vault shortcut

Requirements

Minecraft 26.2
Fabric Loader 0.19.3+
Fabric API
Cloth Config API 26.2.155+
ModMenu (optional, only needed for the in-game settings screen)

Notes

This is a client-only mod — it doesn't need to be installed on the server, and it only ever reads data your own client is already allowed to see (or, on your own singleplayer world, data your own machine already has).