CreeperFire
This server-side mod changes mob behavior in Minecraft by making them vulnerable to sunlight. By default, the modification affects creepers - they now start burning in daylight, just like zombies and skeletons.
Behavior Features
Creepers receive special behavior goals: they will actively avoid sunny areas and seek shelter in the shade. This adds realism to the game and makes daytime more dangerous for players.
Flexible Configuration
The mod isn't limited to just creepers! In configuration files, you can specify any PathfinderMob-type mobs that will be affected by sunlight. This opens up wide possibilities for gameplay customization.
Mob Protection
An interesting detail: if a mob is wearing a helmet, this protection will shield it from sunburns, preserving the head protection mechanics from vanilla gameplay.