Morphica

A disguise changes how an entity or block looks and nothing else: a disguised mob keeps its own AI, drops and behavior. Mob disguises can make a sheep appear as an Enderman, player disguises copy a real player's skin, cape and model, including deadmau5 ears, and block disguises cover an entity with a block, with an optional grid-snapping blend. Animations specific to each mob type, such as a Piglin dancing, a Creeper inflating or a Warden sniffing, can be triggered, along with universal poses like sitting, sleeping, swimming and crouching.

Commands take a disguise type followed by options, and several properties can be set in one command. Tab-completion suggests only the options that fit the chosen disguise type. Look-at targeting selects the entity a player is facing, and a self form lets a player disguise themselves. Morphica is a lightweight, server-authoritative system; it needs Fabric API and runs on client and server, so both the server and every player need the mod. It is released under the MIT License, is not open source, and is published for Fabric only, with files for 26.1 – 26.2 and 1.4.0 for 26.2 as the latest.