What is this and how do I add it?

[VK.Jona83Killer]

Hello everyone, in several servers I have seen these things but I have never known exactly what this is, I think they are sprites or objects without collision or something like that, but could someone tell me what exactly this is and how can I add it?

[Mahmoud Tornado]

It's an object you can make some like this by using Gmax or 3dsmax { 3dsmax is definitely better } and add them on you server like any object.
For sure, you can go to server files and know if it object or not.