Hacking in support for editor scene generation

com.unity.perception/Runtime/Randomization/Randomizers/RandomizerTagManager.cs

 using System;
 using System.Collections.Generic;
+using UnityEditor;
 
 namespace UnityEngine.Perception.Randomization.Randomizers
 {
         /// <returns>RandomizerTags of the given type</returns>
         public IEnumerable<T> Query<T>(bool returnSubclasses = false) where T : RandomizerTag
         {
+            #if UNITY_EDITOR
+            if (!EditorApplication.isPlaying)
+            {
+                foreach (var o in Object.FindObjectsOfType<T>())
+                    yield return o;
+            }
+            #endif
             var queriedTagType = typeof(T);
             if (!m_TagMap.ContainsKey(queriedTagType))
                 yield break;

com.unity.perception/Runtime/Randomization/Scenarios/ScenarioBase.cs

                         $"Invalid state {state} encountered while updating scenario");
             }
         }
+
+        public void DoIteration()
+        {
+            activeScenario = this;
+            OnStart();
+            foreach (var randomizer in activeRandomizers)
+                randomizer.ScenarioStart();
+
+            foreach (var randomizer in activeRandomizers)
+            {
+                randomizer.IterationStart();
+            }
+        }
         #endregion
 
         void IterationLoop()