added explicit check for zero valued random state

com.unity.perception/Runtime/Randomization/Samplers/SamplerUtility.cs

         }
 
         /// <summary>
-        /// Generates new a new random state by deterministically hashing a base seed with an iteration index
+        /// Generates new a new non-zero random state by deterministically hashing a base seed with an iteration index
         /// </summary>
         /// <param name="index">Usually the current scenario iteration or framesSinceInitialization</param>
         /// <param name="baseSeed">The seed to be offset</param>
         {
-            return (uint)Hash64(((ulong)index << 32) | baseSeed) | 1u;
+            var state = (uint)Hash64(((ulong)index << 32) | baseSeed);
+            return state == 0u ? largePrime : state;
         }
 
         /// <summary>