To work this pack do need Optifine
This Resource Pack will change Minecraft's lighting to show where monsters can and can't spawn. Don't forget to enable "Custom Color" in Video Settings > Quality > Custom Colors: ON (You may need to restart the game.)
In 1.18+ mobs only spawn at a light level of 0
| RED | BLUE |
|---|---|
| All monsters can spawn here | All mobs that rely on light levels cannot spawn here |
RED = Dangerous: All monsters can spawn here.
BLUE = Very Safe: All mobs that rely on light levels cannot spawn here.
With Optifine change the option "smooth lightning" to off for more precision