diff --git a/Assets/Mirror/Core/Tools/Vector3Half.cs b/Assets/Mirror/Core/Tools/Vector3Half.cs
new file mode 100644
index 000000000..88b658128
--- /dev/null
+++ b/Assets/Mirror/Core/Tools/Vector3Half.cs
@@ -0,0 +1,125 @@
+#pragma warning disable CS0659 // 'Vector3Half' overrides Object.Equals(object o) but does not override Object.GetHashCode()
+#pragma warning disable CS0661 // 'Vector3Half' defines operator == or operator != but does not override Object.GetHashCode()
+
+// Vector3Half by mischa (based on game engine project)
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Mirror
+{
+    public struct Vector3Half
+    {
+        public Half x;
+        public Half y;
+        public Half z;
+
+        public static readonly Vector3Half zero = new Vector3Half((Half)0, (Half)0, (Half)0);
+        public static readonly Vector3Half one = new Vector3Half((Half)1, (Half)1, (Half)1);
+        public static readonly Vector3Half forward = new Vector3Half((Half)0, (Half)0, (Half)1);
+        public static readonly Vector3Half back = new Vector3Half((Half)0, (Half)0, (Half)(-1));
+        public static readonly Vector3Half left = new Vector3Half((Half)(-1), (Half)0, (Half)0);
+        public static readonly Vector3Half right = new Vector3Half((Half)1, (Half)0, (Half)0);
+        public static readonly Vector3Half up = new Vector3Half((Half)0, (Half)1, (Half)0);
+        public static readonly Vector3Half down = new Vector3Half((Half)0, (Half)(-1), (Half)0);
+
+        // constructor /////////////////////////////////////////////////////////
+        public Vector3Half(Half x, Half y, Half z)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+        }
+
+        // operators ///////////////////////////////////////////////////////////
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Vector3Half operator +(Vector3Half a, Vector3Half b) =>
+            new Vector3Half(a.x + b.x, a.y + b.y, a.z + b.z);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Vector3Half operator -(Vector3Half a, Vector3Half b) =>
+            new Vector3Half(a.x - b.x, a.y - b.y, a.z - b.z);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Vector3Half operator -(Vector3Half v) =>
+            new Vector3Half(-v.x, -v.y, -v.z);
+
+        // [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        // public static Vector3Half operator *(Vector3Half a, long n) =>
+        //     new Vector3Half(a.x * n, a.y * n, a.z * n);
+
+        // [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        // public static Vector3Half operator *(long n, Vector3Half a) =>
+        //     new Vector3Half(a.x * n, a.y * n, a.z * n);
+
+        // == returns true if approximately equal (with epsilon).
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator ==(Vector3Half a, Vector3Half b) =>
+            a.x == b.x &&
+            a.y == b.y &&
+            a.z == b.z;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator !=(Vector3Half a, Vector3Half b) => !(a == b);
+
+        // NO IMPLICIT System.Numerics.Vector3Half conversion because double<->float
+        // would silently lose precision in large worlds.
+
+        // [i] component index. useful for iterating all components etc.
+        public Half this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                switch (index)
+                {
+                    case 0: return x;
+                    case 1: return y;
+                    case 2: return z;
+                    default: throw new IndexOutOfRangeException($"Vector3Half[{index}] out of range.");
+                }
+            }
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        break;
+                    case 1:
+                        y = value;
+                        break;
+                    case 2:
+                        z = value;
+                        break;
+                    default: throw new IndexOutOfRangeException($"Vector3Half[{index}] out of range.");
+                }
+            }
+        }
+
+        // instance functions //////////////////////////////////////////////////
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override string ToString() => $"({x} {y} {z})";
+
+        // equality ////////////////////////////////////////////////////////////
+        // implement Equals & HashCode explicitly for performance.
+        // calling .Equals (instead of "==") checks for exact equality.
+        // (API compatibility)
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Equals(Vector3Half other) =>
+            x == other.x && y == other.y && z == other.z;
+
+        // Equals(object) can reuse Equals(Vector4)
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override bool Equals(object other) =>
+            other is Vector3Half vector4 && Equals(vector4);
+
+#if UNITY_2021_3_OR_NEWER
+        // Unity 2019/2020 don't have HashCode.Combine yet.
+        // this is only to avoid reflection. without defining, it works too.
+        // default generated by rider
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override int GetHashCode() => HashCode.Combine(x, y, z);
+#endif
+    }
+}
diff --git a/Assets/Mirror/Core/Tools/Vector3Half.cs.meta b/Assets/Mirror/Core/Tools/Vector3Half.cs.meta
new file mode 100644
index 000000000..5f025e09e
--- /dev/null
+++ b/Assets/Mirror/Core/Tools/Vector3Half.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: b70bf28681a14c65a37793a87c8df33e
+timeCreated: 1730890316
\ No newline at end of file
diff --git a/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs b/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs
new file mode 100644
index 000000000..300f46d82
--- /dev/null
+++ b/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs
@@ -0,0 +1,150 @@
+using System;
+using NUnit.Framework;
+
+namespace Mirror.Tests.Tools
+{
+    public class Vector3HalfTests
+    {
+        [Test]
+        public void Constructor()
+        {
+            Vector3Half v = new Vector3Half();
+            Assert.That(v.x, Is.EqualTo((Half)0));
+            Assert.That(v.y, Is.EqualTo((Half)0));
+            Assert.That(v.z, Is.EqualTo((Half)0));
+        }
+
+        [Test]
+        public void ConstructorXYZ()
+        {
+            Vector3Half v = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Assert.That(v.x, Is.EqualTo((Half)1));
+            Assert.That(v.y, Is.EqualTo((Half)2));
+            Assert.That(v.z, Is.EqualTo((Half)3));
+        }
+
+        [Test]
+        public void OperatorAdd()
+        {
+            Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Vector3Half b = new Vector3Half((Half)2, (Half)3, (Half)4);
+            Assert.That(a + b, Is.EqualTo(new Vector3Half((Half)3, (Half)5, (Half)7)));
+        }
+
+        [Test]
+        public void OperatorSubtract()
+        {
+            Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Vector3Half b = new Vector3Half((Half)(-2), (Half)(-3), (Half)(-4));
+            Assert.That(a - b, Is.EqualTo(new Vector3Half((Half)3, (Half)5, (Half)7)));
+        }
+
+        [Test]
+        public void OperatorInverse()
+        {
+            Vector3Half v = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Assert.That(-v, Is.EqualTo(new Vector3Half((Half)(-1), (Half)(-2), (Half)(-3))));
+        }
+
+        // [Test]
+        // public void OperatorMultiply()
+        // {
+        //     Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+        //     // a * n, n * a are two different operators. test both.
+        //     Assert.That(a * (Half)2, Is.EqualTo(new Vector3Half((Half)2, (Half)4, (Half)6)));
+        //     Assert.That((Half)2 * a, Is.EqualTo(new Vector3Half((Half)2, (Half)4, (Half)6)));
+        // }
+
+#if UNITY_2021_3_OR_NEWER
+        [Test]
+        public void OperatorEquals()
+        {
+            // two vectors which are approximately the same
+            Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Vector3Half b = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Assert.That(a == b, Is.True);
+
+            // two vectors which are definitely not the same
+            Assert.That(a == Vector3Half.one, Is.False);
+        }
+
+        [Test]
+        public void OperatorNotEquals()
+        {
+            // two vectors which are approximately the same
+            Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Vector3Half b = new Vector3Half((Half)1, (Half)2, (Half)3);
+            Assert.That(a != b, Is.False);
+
+            // two vectors which are definitely not the same
+            Assert.That(a != Vector3Half.one, Is.True);
+        }
+#endif
+
+        [Test]
+        public void OperatorIndexer()
+        {
+            Vector3Half a = new Vector3Half((Half)1, (Half)2, (Half)3);
+
+            // get
+            Assert.That(a[0], Is.EqualTo((Half)1));
+            Assert.That(a[1], Is.EqualTo((Half)2));
+            Assert.That(a[2], Is.EqualTo((Half)3));
+            Assert.Throws<IndexOutOfRangeException>(() =>
+            {
+                Half _ = a[-1];
+            });
+            Assert.Throws<IndexOutOfRangeException>(() =>
+            {
+                Half _ = a[3];
+            });
+
+            // set
+            a[0] = -1;
+            a[1] = -2;
+            a[2] = -3;
+            Assert.Throws<IndexOutOfRangeException>(() => { a[-1] = (Half)0; });
+            Assert.Throws<IndexOutOfRangeException>(() => { a[3] = (Half)0; });
+            Assert.That(a, Is.EqualTo(new Vector3Half((Half)(-1), (Half)(-2), (Half)(-3))));
+        }
+
+        [Test]
+        public void ToStringTest()
+        {
+            // should be rounded to :F2
+            Vector3Half v = new Vector3Half((Half)(-10), (Half)0, (Half)42);
+            Assert.That(v.ToString(), Is.EqualTo("(-10 0 42)"));
+        }
+
+#if UNITY_2021_3_OR_NEWER
+        [Test]
+        public void EqualsVector3Half()
+        {
+            Assert.That(Vector3Half.one.Equals(Vector3Half.one), Is.True);
+            Assert.That(Vector3Half.one.Equals(Vector3Half.zero), Is.False);
+        }
+
+        [Test]
+        public void EqualsObject()
+        {
+            Assert.That(Vector3Half.one.Equals((object)42), Is.False);
+            Assert.That(Vector3Half.one.Equals((object)Vector3Half.one), Is.True);
+            Assert.That(Vector3Half.one.Equals((object)Vector3Half.zero), Is.False);
+        }
+
+        [Test]
+        public void GetHashCodeTest()
+        {
+            // shouldn't be 0
+            Assert.That(Vector3Half.zero.GetHashCode(), !Is.EqualTo(0));
+            Assert.That(Vector3Half.one.GetHashCode(), !Is.EqualTo(0));
+
+            // should be same for same vector
+            Assert.That(Vector3Half.zero.GetHashCode(), Is.EqualTo(Vector3Half.zero.GetHashCode()));
+
+            // should be different for different vectors
+            Assert.That(Vector3Half.zero.GetHashCode(), !Is.EqualTo(Vector3Half.one.GetHashCode()));
+        }
+#endif
+    }
+}
diff --git a/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs.meta b/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs.meta
new file mode 100644
index 000000000..d70f401d2
--- /dev/null
+++ b/Assets/Mirror/Tests/Editor/Tools/Vector3HalfTests.cs.meta
@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: bc5f32db47ab4ffb92433050cc1b6e9f
+timeCreated: 1730890719
\ No newline at end of file