delaunator-sharp VS com.unity.netcode.gameobjects

Well, the easiest option would probably be to use a different Delaunay/Voronoi library. Delaunator (C# bindings here) should be a pretty good option: it's fast, and there's a good explanation of how to use the data structures it generates. There is some weirdness with how points at the edge of the domain work that you may have to work around, but that will probably be easier than trying to modify another algorithm or write your own. I know I've struggled to implement the algorithms for calculating Voronoi diagrams/Delaunay triangulations, even though I feel like I have a decent high-level understanding of how Fortune's algorithm is supposed to work.

Yes ! Exactly. I already started working on it, and it's going well, but I am having a little trouble working with this. I can't find any tutorials online though, so I have to do figure it out on my own :)

Unless you really want to learn the details of the triangulation algorithm, I recommend to just use a open source implementation in C#. Here's one that works fine with Unity: https://github.com/nol1fe/delaunator-sharp

There was this issue: Custom Serialization can't be used because of compile-time error in RPCs. · Issue #665 · Unity-Technologies/com.unity.netcode.gameobjects (github.com) and this one Error in editor ArgumentException: An item with the same key has already been added · Issue #714 · Unity-Technologies/com.unity.netcode.gameobjects (github.com) Though I guess there has been many changes on Network for GameObjects since then.

Ok so while writing this I went and found in the github project for the netcode gameobjects an example of grabbing an item, have a look~ https://github.com/Unity-Technologies/com.unity.netcode.gameobjects/blob/develop/testproject/Assets/Scripts/GrabbableBall.cs

Netcode for GO: https://github.com/Unity-Technologies/com.unity.netcode.gameobjects

Turns out downgrading Netcode for Gameobjects from 1.0.1 to 1.0.0 is the solution for this. Here's the link for the working version of Netcode: Netcode v1.0.0

Steam Networking (I used Unity therefore, this was also very helpful: Facepunch Steamworks / MLAPI)

This is in NetworkTransform line 360 in the Unity Netcode https://github.com/Unity-Technologies/com.unity.netcode.gameobjects/blob/9ffd22b158fbac5ea824cb7e9e237d2d8b782ed0/com.unity.netcode.gameobjects/Components/NetworkTransform.cs

I bet you're using Mirror. I peeked at their code base (and Unity's new netcode project) and decided to write my own networking framework instead. It sucks to be stuck with problems that someone else created.

I think they rebranded it to netcode for gameobjects. Github repo seems to update daily: https://github.com/Unity-Technologies/com.unity.netcode.gameobjects

E.g. We just released Boss Room, our new multiplayer sample game. It is built using our experimental version of MLAPI, the mid-level netcode Unity acquired last year. MLAPI is fully open-source under a MIT license. We're continuing to develop it in the open, taking both RFCs and PRs from the community. More info can be found both on our GitHub page and Multiplayer Docs site. https://github.com/Unity-Technologies/com.unity.multiplayer.mlapi https://docs-multiplayer.unity3d.com/ Best wishes!