Allow for equiping your optifine cape in the cosmetics locker for later versions that uses sodium instead of optifine. There are mods that does this but I haven't managed to find one up to date with the latest versions.
#Optifine cape on Sodium
wide bobcat
dusky kiln
wide bobcat
This feature could also possibly render other peoples optifine capes if they own one and doesn't have any other Lunar cloaks active.