Mesh Combiner in unity

Question

Hello I am using this guy's script https://www.youtube.com/watch?v=wYAlky1aZn4 to combine meshes because the game is "lagging" or whatever it's called when the when it doesn't run smooth. I have 34*124 cubes with two different meshes and all works perfect if I put the script on a object with 34*20 childern (the same cubes that I mentioned before) but if I put it on the object that has 32*124 children it turnes them into something that looks like it has 34*20 cubes.

Basically it if I put the script on something that has more childern it turns it into something smaller.

This is the code from the video:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CombineMeshes : MonoBehaviour {
    public void Combine(){
        Quaternion oldRot = transform.rotation;
        Vector3 oldPos = transform.position;

        transform.rotation = Quaternion.identity;
        transform.position = Vector3.zero;

        MeshFilter[] filters = GetComponentsInChildren<MeshFilter> ();

        Mesh finalMesh = new Mesh ();

        CombineInstance[] combiners = new CombineInstance[filters.Length];

        for (int a = 0; a < filters.Length; a++) {
            if (filters [a].transform == transform) {
                continue;
            }

            combiners [a].subMeshIndex = 0;
            combiners [a].mesh = filters [a].sharedMesh;
            combiners [a].transform = filters [a].transform.localToWorldMatrix;
        }

        finalMesh.CombineMeshes (combiners);

        GetComponent<MeshFilter> ().sharedMesh = finalMesh;

        transform.rotation = oldRot;
        transform.position = oldPos;
        for (int a= 0; a < transform.childCount; a++) {
            transform.GetChild (a).gameObject.SetActive (false);
        }
    }
}

Answer 1

That is exactly the vertex limit problem you are having. With your set up 1 mesh can have only 34*20*96 = 65.280 vertices. After that you need another mesh. 124*34*96 makes 404,736 and is over the limit. Therefore, you need to change format of your mesh to UInt32. If the lag continues i can try to help further. Good luck!