Further reduce lucky spawns

Project/Assets/ML-Agents/Examples/PushBlock/Scenes/2ZombieVs3AgentsPushBlock.unity

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Project/Assets/ML-Agents/Examples/PushBlock/Scripts/PushAgentCollab.cs

             ForceMode.VelocityChange);
     }
 
-    public override void CollectObservations(VectorSensor sensor)
-    {
-        if (useVectorObs)
-        {
-            sensor.AddObservation(StepCount / (float)MaxStep);
-        }
-    }
+    // public override void CollectObservations(VectorSensor sensor)
+    // {
+    //     if (useVectorObs)
+    //     {
+    //         sensor.AddObservation(StepCount / (float)MaxStep);
+    //     }
+    // }
 
     /// <summary>
     /// Called every step of the engine. Here the agent takes an action.

Project/Assets/ML-Agents/Examples/PushBlock/Scripts/ZombiePushBlockDeathEnvController.cs

         //Reset Blocks
         foreach (var item in BlocksList)
         {
-            var pos = UseRandomBlockPosition ? GetRandomSpawnPos(3f, 3f) : item.StartingPos;
+            var pos = UseRandomBlockPosition ? GetRandomSpawnPos(2.5f, 2.5f) : item.StartingPos;
             var rot = UseRandomBlockRotation ? GetRandomRot() : item.StartingRot;
 
             item.T.transform.SetPositionAndRotation(pos, rot);