Must have to install Hatred datapack. Contain essential textures like custom armors, guns, foods, medicines ... you name it
Datapack is still playable however the missing texture will bother you a hell lot. So unless you're a masochist or love the color purple and black so much then ... yk what i'm not your parents, do whatever you want.
Feats:
2d and 3d textures/models, sometime both in 1 package
custom armor ( v 6.5+)
more than 300 or something i lost count textures:
43 guns because they're cool
64 other weapons to kill zombies horray
64 differents food
and a bunch more not to mention half of them are like... not implemented