LODFixer.cs

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

public class LODFixer {


    [MenuItem("Window/FixLODRendeer")]
    static void LODRendeer()
    {

        LODGroup[] lodgroups = (LODGroup[])GameObject.FindObjectsOfType(typeof(LODGroup));
        //For every LOD group: get the current groups and get the renderer names..
        foreach (LODGroup lodgroup in lodgroups)
        {
            SerializedObject obj = new SerializedObject(lodgroup);
 
            LOD[] newLods = new LOD[lodgroup.lodCount];
 
            //For every LOD level in this lodgroup..
            for(int groupNR=0; groupNR < lodgroup.lodCount; groupNR++){  
           
                List<Renderer> newRens = new List<Renderer>();
                //For every renderer in this lodgroup...
                for(int i=0; i< obj.FindProperty("m_LODs.Array.data["+groupNR+"].renderers").arraySize;i++){  
                    SerializedProperty prop = (SerializedProperty)obj.FindProperty("m_LODs.Array.data["+groupNR+"].renderers").GetArrayElementAtIndex(i);
                    SerializedProperty propRenderer = prop.FindPropertyRelative("renderer");
                    Renderer ren = propRenderer.objectReferenceValue as System.Object as Renderer;
 
                    if(ren!=null){
                        string targetName = ren.name+".ODCObj";
                        Transform target = ren.transform.parent.FindChild(targetName);
                        if(target==null){
                            Debug.LogWarning("No coversion found for "+targetName+  " has "+ren.sharedMaterial.shader);
                            newRens.Add (ren);
                            if(!ren.enabled)
                                Debug.LogError("Renderer disabled: "+ren.name);
                        }else{
                            newRens.Add (target.GetComponent<Renderer>());
                            if(!target.GetComponent<Renderer>().enabled){
                                Debug.LogError("Renderer disabled: "+target.GetComponent<Renderer>().name);
                            }
                            if(ren.enabled)
                                Debug.LogError("Renderer ENAbled but not added to LOD! "+ren.name);
                        }
 
                        Debug.Log (lodgroup.name+" ["+groupNR+"] - "+ren.name);
                    }
 
                }
                SerializedProperty screenHei = obj.FindProperty("m_LODs.Array.data["+groupNR+"].screenRelativeHeight");                      
                newLods[groupNR] = new LOD(screenHei.floatValue,  newRens.ToArray() );
 
            }
            if(newLods.Length>0){
                Debug.Log ("Setting: "+lodgroup.name);
                lodgroup.SetLODS(newLods);
            }
        }
    }
}