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 | ❌ | |
shield_patterns | ✔ | |
shulker_boxes | ✔ | |
signs | ✔ |
I can confirm this issue.