Gleam
A lightweight, client-side Fabric mod that renders a light overlay to show exactly where mobs can spawn.
Screenshots
About this Mod
Gleam
A lightweight, client-side Fabric mod that renders a light overlay to show exactly where mobs can spawn.
Translucent red overlays indicate where monsters can spawn (block light 0).
Translucent yellow markers show the most efficient locations for torch placement.
Features
- Renders a translucent red overlay on blocks that are dark enough for monsters to spawn (block light level 0).
- Optimal Torch Placement: Calculates efficient locations for torches, rendered as golden markers, based on a fixed world grid to maximize coverage with minimal torches.
- Smart scanning only highlights valid spawn locations (solid blocks with air above them).
- Configurable Visibility Modes: Toggle (default), Hold or Always Show.
- Performance-friendly, throttled area scanning to maintain high framerates.
- Fully client-side; works perfectly on multiplayer servers.
Usage
By default, press F7 to toggle the light overlay on and off. You can change this behavior to "Hold" or "Always" in the configuration menu.
The keybind can be changed in the vanilla Minecraft controls menu under the "Misc" category.
Configuration
Gleam supports ModMenu for in-game configuration. You can also manually edit the config/gleam.json file.
Available settings:
- Visibility Mode: Choose how the overlay is shown (Hold key, Toggle with key or Always).
- Optimal Torches: Toggle the display of golden markers showing the most efficient locations for torch placement. These are fixed to a stable world grid and will not shift around as you move.
- Horizontal Radius: The horizontal distance scanned around the player for dark blocks.
- Vertical Radius: The vertical distance (up and down) scanned around the player for dark blocks.
Installation
- Install Fabric Loader for Minecraft 1.21.10.
- Download the Fabric API mod.
- Download the latest compiled
.jarfrom the Releases page. - Place both
.jarfiles into your.minecraft/modsfolder.
Requirements
- Minecraft 1.21.10
- Fabric Loader 0.19.2+
- Fabric API
- ModMenu (Optional, for in-game configuration)
License
This project is licensed under the GNU General Public License v3.0 (GPL-3.0).
Available Versions
How to Install Gleam on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Gleam". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Gleam server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Gleam compatible with fabric?
Gleam officially supports fabric for Minecraft 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Gleam – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Gleam consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install Gleam with just one click on your server.