Blood colors: red=players/animals/humanoids, undead=infected flesh, green=creepers/slimes, violet=arthropods/end, teal=aquatic/guardians, amber=magma/fire. Each type has three different splotch shapes at three densities for item display ground decals. The transient impact spray uses native Minecraft DUST particles and does not depend on custom models. Five-minute lifetime belongs to the server module, not this resource pack. No blood from skeletons.