`ModelCollider` from procedural Model not correctly replicated

Describe the bug

Hi,

Edited 26/10/2024 17:30 CEST (simpler example)

I'm working with ModelCollider from a Procedural Model (sbox_procedural_model.vmld) attached to a Network GameObject that i refresh through GameObject.Network.Refresh() for other clients.

However, it seems that the Convex Hull collision model is not correctly replicated to other clients.

Let's jump to the reproduction steps

To Reproduce

1) Download the sbox-scenestaging repository. 2) Update the Gun.cs file with the provided OnUpdate() code.

protected override void OnUpdate()
{
    if ( IsProxy )
        return;

    var pc = Components.GetInAncestors<PlayerController>();
    if ( !pc.IsValid() )
        return;

    if ( Input.Pressed( "Attack1" ) && Game.ActiveScene.GetAllObjects( true ).FirstOrDefault( x => x.Name == "TestCollider" ) == null )
    {
        Log.Info( "Attack1" );

        var go = new GameObject();
        go.Name = "TestCollider";
        go.WorldPosition = pc.WorldPosition;

        /* */

        var goSubColumn = new GameObject();
        goSubColumn.Name = "Column";
        goSubColumn.SetParent( go, false );
        goSubColumn.WorldPosition = go.WorldPosition;
        goSubColumn.WorldRotation = go.WorldRotation;
        goSubColumn.LocalPosition = new Vector3( 0, 0, 0);

        go.NetworkSpawn();
    }

    if ( Input.Pressed( "Attack2" )  )
    {
        Log.Info( "Attack2" );

        var go = Game.ActiveScene.GetAllObjects( true ).FirstOrDefault( x => x.Name == "TestCollider" );
        if ( !go.IsValid() ) { return; }

        foreach ( var goColumn in go.GetAllObjects( true ).Where( x => x.Name.Contains( "Column" ) ) )
        {
            float factor = 64f;

            Vector3[] myCube = new Vector3[]
            {
                new Vector3(-0.5f, -0.5f, -0.5f) * factor,
                new Vector3(0.5f, -0.5f, -0.5f) * factor,
                new Vector3(0.5f, 0.5f, -0.5f) * factor,
                new Vector3(-0.5f, 0.5f, -0.5f) * factor,
                new Vector3(-0.5f, -0.5f, 0.5f) * factor,
                new Vector3(0.5f, -0.5f, 0.5f) * factor,
                new Vector3(0.5f, 0.5f, 0.5f) * factor,
                new Vector3(-0.5f, 0.5f, 0.5f) * factor
            };

            var modelBuilder = new ModelBuilder();
            modelBuilder.AddCollisionHull( myCube );
            var model = modelBuilder.Create();

            var mainCollider = goColumn.Components.GetOrCreate<ModelCollider>();
            mainCollider.Model = model;
        }

        go.Network.Refresh();
    }
}

4) Start the networking.scene. 5)

Connect a secondary user.
Using the Host, press "Attack1" to spawn box.
Using the Host, press "Attack2" to create a ModelCollider from a procedural model. Collider is now looking as:
Using the secondary user, test the collision ; This does not match the Host collider. even after calling GameObject.Network.Refresh()

6) Extra:

Set Connection.CanRefreshObjects to true in GameNetworkManager.cs.
Restart the scene.
Connect a secondary user.
Using the secondary, press "Attack1" to spawn box.
Using the secondary, press "Attack2" to create a ModelCollider from a procedural model.
Using the Host, observe the collider; it does not match the secondary user's collider

Expected behavior

The ModelCollider from this Procedural Model must be correctly replicated

Also I’m wondering if I might be doing something wrong, as @Metapyziks has successfully worked on procedural models using the SDF library without encountering this issue. Could it be that each client needs to rebuild the collider logic on their side?

Media/Files

(old) Reproduction steps in video:

https://github.com/user-attachments/assets/58b1c149-f85a-4d76-bcfc-865f6ac5ba3e

Additional context

No response

I updated the issue with an easier example of the reproduction steps: 1) Edit Gun.cs -> OnUpdate()

protected override void OnUpdate()
{
    if ( IsProxy )
        return;

    var pc = Components.GetInAncestors<PlayerController>();
    if ( !pc.IsValid() )
        return;

    if ( Input.Pressed( "Attack1" ) && Game.ActiveScene.GetAllObjects( true ).FirstOrDefault( x => x.Name == "TestCollider" ) == null )
    {
        Log.Info( "Attack1" );

        var go = new GameObject();
        go.Name = "TestCollider";
        go.WorldPosition = pc.WorldPosition;

        /* */

        var goSubColumn = new GameObject();
        goSubColumn.Name = "Column";
        goSubColumn.SetParent( go, false );
        goSubColumn.WorldPosition = go.WorldPosition;
        goSubColumn.WorldRotation = go.WorldRotation;
        goSubColumn.LocalPosition = new Vector3( 0, 0, 0);

        go.NetworkSpawn();
    }

    if ( Input.Pressed( "Attack2" )  )
    {
        Log.Info( "Attack2" );

        var go = Game.ActiveScene.GetAllObjects( true ).FirstOrDefault( x => x.Name == "TestCollider" );
        if ( !go.IsValid() ) { return; }

        foreach ( var goColumn in go.GetAllObjects( true ).Where( x => x.Name.Contains( "Column" ) ) )
        {
            float factor = 64f;

            Vector3[] myCube = new Vector3[]
            {
                new Vector3(-0.5f, -0.5f, -0.5f) * factor,
                new Vector3(0.5f, -0.5f, -0.5f) * factor,
                new Vector3(0.5f, 0.5f, -0.5f) * factor,
                new Vector3(-0.5f, 0.5f, -0.5f) * factor,
                new Vector3(-0.5f, -0.5f, 0.5f) * factor,
                new Vector3(0.5f, -0.5f, 0.5f) * factor,
                new Vector3(0.5f, 0.5f, 0.5f) * factor,
                new Vector3(-0.5f, 0.5f, 0.5f) * factor
            };

            var modelBuilder = new ModelBuilder();
            modelBuilder.AddCollisionHull( myCube );
            var model = modelBuilder.Create();

            var mainCollider = goColumn.Components.GetOrCreate<ModelCollider>();
            mainCollider.Model = model;
        }

        go.Network.Refresh();
    }
}

Result on each client (except the one who ran the code):

Expected on each client :

Facepunch / sbox-issues