SunBurn

The sun will not always be an ally. One day it will come too close, and you will have to run from it underground.

SunBurn is a progressive challenge mod for Minecraft 1.21.1 on NeoForge. The world grows more dangerous over time: burning days turn the surface into a hostile place, and every new event makes survival harder.

During a Burn

• The sky turns orange and yellow.
• The sun gradually grows larger, as if it is moving closer to the world.
• An orange solar filter appears on the player's screen.
• After noon, exposed players take heavy damage from the sun.
• Grass burns away and turns into dirt.
• Random fires can appear across loaded surface areas.
• Cadavers can naturally spawn under direct sunlight.
• Night still arrives normally, and the world becomes safe again until the next burning day.

The best shelter is a deep cave. SunBurn checks more than the blocks directly above the player: it evaluates sky access and terrain depth around them. A small roof on the surface is not enough, while a large cave deep underground is safe.

World Progression

The first burn begins on day 20 by default. Over time, the interval between events becomes shorter, and burns can last for several consecutive days with normal nights in between.

The world changes after repeated burns:

• After the 4th burn, exposed non-husk mobs take solar damage and natural peaceful mob spawning stops.
• After the 6th burn, fishing no longer produces catches.
• After the 8th burn, crops and trees stop growing.
• After the 12th burn, natural health regeneration is disabled.

Sun Protection

SunBurn adds a Sun Protection Potion.

Awkward Potion + Blue Ice = Sun Protection Potion

Normal, long, splash, and lingering variants are available. The effect protects players from solar damage.

Commands

/sunburn start
/sunburn stop
/sunburn next <days>
/sunburn status

Configuration

All main mechanics can be configured through the Mod Menu and config file:

• first burn day;
• event intervals and duration progression;
• required shelter depth;
• player and mob solar damage;
• grass scorching rate;
• fire chance;
• every world progression threshold.

Compatibility

• Minecraft 1.21.1
• NeoForge 21.1.235 or newer
• Works in single-player and on dedicated servers.