While all other atlases use a prefix when using a directory type, matching the source, mob effects and paintings do not. (except particles, see MC-253027 for that one; kept separate as those can get textures added via resource packs))

This inconsistency might confuse mod authors as the prefixes are present in all other atlases.

Atlas	Uses prefix?	Note
banner_patterns
beds
blocks
chests
mob_effects
paintings
particles		MC-253027
shield_patterns
shulker_boxes
signs