diff --git a/Runtime/Scripts/ModelBaker/MeshCombiner.cs b/Runtime/Scripts/ModelBaker/MeshCombiner.cs
index f0d3c34..9ebcd44 100644
--- a/Runtime/Scripts/ModelBaker/MeshCombiner.cs
+++ b/Runtime/Scripts/ModelBaker/MeshCombiner.cs
@@ -211,6 +211,20 @@ namespace TAO.VertexAnimation
 
 			// Actually combine and recalculate mesh.
 			Mesh skinnedMesh = new Mesh();
+
+			// Large mesh support.
+			int vertexCount = 0;
+			foreach (var ci in combineInstances)
+			{
+				vertexCount += ci.mesh.vertexCount;
+			}
+
+			if (vertexCount > 65535)
+			{
+				skinnedMesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
+			}
+
+			// Combine meshes.
 			skinnedMesh.CombineMeshes(combineInstances.ToArray(), true, true);
 			skinnedMesh.RecalculateBounds();
 
diff --git a/Runtime/Scripts/ModelBaker/MeshSimplifier.cs b/Runtime/Scripts/ModelBaker/MeshSimplifier.cs
index d64b400..e1ab8cb 100644
--- a/Runtime/Scripts/ModelBaker/MeshSimplifier.cs
+++ b/Runtime/Scripts/ModelBaker/MeshSimplifier.cs
@@ -261,7 +261,13 @@ namespace TAO.VertexAnimation
 					tris.Add(t * 3 + v - skipped);
 				}
 			}
-	
+
+			// Large mesh support.
+			if (vertices.Count > 65535)
+			{
+				mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
+			}
+
 			mesh.vertices = vertices.ToArray();
 			mesh.normals = normals.ToArray();