alot of texture packs (especially loka packs) use optifine to have a CIT (custom item texture) for things like knockback swords that help you properly differentiate between swords and use them accordingly however as of right now you can only see CITs in your own inventory and have no way to tell if the other person is holding a KB sword i think it would be useful and more intuitive for things like objective play to see if your opponent is holding a KB sword as most loka players use texture packs with these CITs already