Light Overlay
by shedaniel
Displays colored overlays on blocks showing where mobs can spawn based on light level, helpful for spawn-proofing.
Overview
Light Overlay is a utility mod created by shedaniel. Displays colored overlays on blocks showing where mobs can spawn based on light level, helpful for spawn-proofing. As a utility mod it concentrates on quality-of-life and convenience, and it has been downloaded around 30 million times, which puts it among the options players reach for in this space.
Light Overlay is built for players who want to see exactly where mobs can spawn. It overlays the world with markers showing low-light blocks, making spawn-proofing bases and farms straightforward. It is approachable enough to drop into a world and use right away, with little setup required.
The mod is available for Forge, Fabric, and NeoForge, so it fits a range of modpacks and launchers. It currently supports Minecraft 1.20.1 and 1.21.1, spanning the 1.20.1 to 1.21.1 releases. It is a client-side mod, which means you can add it to your own game for personal benefit even when the server you join does not run it.
Mod Loaders
Minecraft Versions
Key Features
Light Overlay brings a focused set of features to the table. Highlights include color-coded light level overlays, plus shows mob-spawnable blocks, with the full list below.
- Color-coded light level overlays
- Shows mob-spawnable blocks
- Toggleable with keybind
- Configurable display range
- Number and cross display modes
Dependencies
This mod requires the following dependencies to be installed:
Tags
How to install Light Overlay
Light Overlay supports Forge, Fabric, and NeoForge; pick one loader (you cannot mix them) and install it for your chosen Minecraft version. It is built for Minecraft 1.20.1 and 1.21.1, so make sure your profile uses one of those versions.
- 1Choose and install one mod loader from Forge, Fabric, and NeoForge for a Minecraft version this mod supports (1.20.1 and 1.21.1).
- 2Download the required dependencies for the same version and loader: Architectury API and Cloth Config. Light Overlay will not load without them.
- 3Drop the Light Overlay .jar file into your instance's mods folder. On a server, place it in the server's mods folder instead, and each player who wants it adds it to their own client.
- 4Launch the game with that loader profile and confirm Light Overlay appears in the in-game mods list; if it does not load, re-check the loader, the Minecraft version, and the dependencies above.
Supported Minecraft versions: 1.20.1 and 1.21.1. Always download the build that matches your version exactly, as mod files are version-specific.
See our full mod install guideCompatibility & alternatives
Light Overlay works particularly well alongside Architectury API and Cloth Config. It depends on Architectury API and Cloth Config, so those must be present and on the same loader and version. Because it ships for both Fabric and Forge-family loaders, it slots into most popular modpacks regardless of which side they are built on.
Light Overlay has a modest footprint for what it adds and is widely used in modpacks without notable performance concerns.
If you are comparing options, a similar mod worth a look is Spawn indicators in minimaps. They overlap in purpose, so most players pick whichever suits their loader and pack.
Frequently asked questions
What does the Light Overlay mod do?
Displays colored overlays on blocks showing where mobs can spawn based on light level, helpful for spawn-proofing. It is a utility mod by shedaniel, aimed at players who want to see exactly where mobs can spawn.
Is Light Overlay Forge or Fabric?
Light Overlay supports Forge, Fabric, and NeoForge. You only install it on one of these loaders, never several at once, so choose the one your pack uses.
What Minecraft versions does Light Overlay support?
Light Overlay supports Minecraft 1.20.1 and 1.21.1. Be sure to download the file built for your specific version, since mod jars are not interchangeable across versions.
Does Light Overlay need any dependencies?
Yes. Light Overlay requires Architectury API and Cloth Config to be installed on the same loader and Minecraft version, or it will fail to load.
Can I use Light Overlay on a multiplayer server?
Yes. Light Overlay is client-side, so you can run it yourself on any server, even one that does not have the mod, since it does not require server support.
Play modded Minecraft
Host a modded server with Astroworld Hosting or join our community.
Try Astroworld Hosting