FFMobSunBurnAngle
by Fyxe
FFMobSunBurnAngle changes when sunlight-sensitive mobs burn and where monsters can spawn, by testing a ray aimed at the sun instead of a plain vertical sky check.
What it does
Sunlight-sensitive mobs are set alight based on a directional test: a ray is cast toward the sun, so a block that overhangs a mob can shade it. Spawn prevention uses the same test to stop monsters from appearing where they would burn at once. Mob filters in whitelist and blacklist modes decide which mobs each check applies to, and a blacklist of blocks such as leaves and mangrove roots can be set so those blocks do not count as cover.
The mod is aimed at worlds with floating islands, tall cliffs and overhangs, where a vertical sky check gives the wrong answer. Checks are staggered and share a sun-vector cache with a per-mob decision cache, and the ray distance can be set to stay within the simulation distance. An optional client-side visualization draws the debug rays. The mod uses the dimension's celestial angle, so it works with day-length and season mods. The mod runs on the server, and clients may add it for the debug view.
Key features
Directional sun burning
Mobs burn only when the ray toward the sun reaches them, so overhangs and cliffs cast real shade.
Spawn prevention
Monsters are kept from spawning where a clear line of sight to the sun would set them alight right away.
Transparent blocks
Glass and other non-occluding blocks can be set to pass light through, with a configurable blacklist for leaves and mangrove roots.
Mob filter
Whitelist and blacklist modes both apply to the burning and spawn checks, so only chosen mobs are affected.
Debug rays
An optional client-side view draws the rays used for each decision, which helps when tuning a world.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Embedded 1
Use cases
Who it’s for: Server owners running worlds with unusual terrain, and modpack makers who want sun checks that match the geometry of the map.
How it compares
Phantom Prevention, Evoker Prevention and Vindicator Prevention each run on NeoForge alone for 1.21 – 1.21.11, are server-side only and are all rights reserved, so they cover single mob types. Mob Blacklist is open source under the MIT License, is server-side only and works on Fabric for 1.21.1 – 26.1.2, but it filters mobs without a sun check.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| FFMobSunBurnAngle | Fabric and NeoForge | 1.21.1 – 26.3 | Server required, client optional | 2026-10-08 |
| Phantom Prevention | NeoForge | 1.21 – 1.21.11 | Server-side only | 2026-01-13 |
| Evoker Prevention | NeoForge | 1.21 – 1.21.11 | Server-side only | 2026-01-22 |
| Vindicator Prevention | NeoForge | 1.21 – 1.21.11 | Server-side only | 2026-01-22 |
| Mob Blacklist | Fabric | 1.21.1 – 26.1.2 | Server-side only | 2026-06-02 |
Questions
Does FFMobSunBurnAngle need Fabric API?
Does every player need the mod installed?
Which versions are supported?
Does it work with day-length mods?
In the catalog
FFMobSunBurnAngle is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 8,071 mods support Minecraft 26.3.
More from Fyxe
Similar mods
What the author says
A simple mod that changes how sunlight-sensitive mobs burn and (optionally) where monsters can spawn. Made for use with non-traditional type world generation (e.g. floating islands / tall cliffs / overhangs) and with performance in mind.
Official listing
- Modrinth page
- modrinth.com/mod/ffmobsunburnangle
- Owner
- Fyxe
- Published
- 2026-08-16
- Updated on Modrinth
- 2026-10-08
- Facts verified
- 2026-10-15