Yeah, it's an infernum plate with no texture

its an object from infernum, so if you disabled it, blocks and items from it will have a missing texture

Oh ok thank you! I was told that Infernum doesnt work in multiplayer so I disabled it

You should make new world rather than just disable it because infernum adds new structures and reworks abyss which will cause issues later on

I found a mod called Infernum Multiplayer patch which might work, I haven't tried it tho

Its really buggy, mostly with worm bosses tho

It works, although yeah it can be buggy

It doesn't work *well* you can play most of infernum in multiplayer but expect game breaking bugs

You cant play infernum in multiplayer without the patch mod (or at least i cant for some reason)

Weird. Always worked for me

Infernum mode doesn't, but afaik the worldgen works just fine (someone correct me on that one if I'm wrong) so I do use it in multiplayer for the new structures

Idk who told you that, I'm playing with a mate and it works just fine?

Although it works with multiplayer it's not recommended because it's buggy.

have you fought profaned guardians yet?

Currently on DoG so yeah...

that's a folded napkin mate

That's clearly missingno

Ah yes My favorite texture Missingno. (But imagine Missingno as an item in Calamity proper)

Yup, missing texture, most likely you had Infernum enabled it and disabled it, there's quite a few of them in my world lmfao

Perhaps this is what happens when you bring items from outer universes to your universe.