Zombie Improvements Mod 1.21–26.3

The Zombie Improvements mod enhances existing zombie leader and reinforcement mechanics and addresses associated bugs. It introduces a red aura, unique textures and sounds, and increased size for leader zombies. A distinct sound plays when a zombie spawns reinforcements, using the block breaking sound of the newly spawned zombie's standing block, repeated five times over two seconds. The mod also appends a "Leader" prefix to the name of leader mobs. Additionally, it fixes vanilla bugs MC-219981 and MC-14800 (for version 1.21.1 only).

Further tweaks include configurable attack damage for leader zombies, which is slightly increased by default, and a configurable spawn chance for them. The mod allows only leader zombies to spawn additional reinforcements and prevents mob spawners from generating leaders or zombies capable of spawning reinforcements. This aims to clarify and refine the visual and auditory cues for these mechanics, which are present on all difficulty levels for calling other zombies and on Hard difficulty for spawning reinforcements.