new Hightlight system

Assets/Scripts/Effects/Highlight.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+public class Hightlight : MonoBehaviour
+{
+    [SerializeField]
+    private Color color = new Color(147, 142, 142, 1);
+
+    private Renderer[] renderers;
+    //helper list to cache all the materials ofd this object
+    private List<Material> materials;
+
+    //Gets all the materials from each renderer
+    private void Awake()
+    {
+        renderers = GetComponentsInChildren<Renderer>();
+        materials = new List<Material>();
+        foreach (var renderer in renderers)
+        {
+            //A single child-object might have mutliple materials on it
+            //that is why we need to all materials with "s"
+            materials.AddRange(new List<Material>(renderer.materials));
+        }
+    }
+
+    public void ToggleHighlight(bool val)
+    {
+        if (val)
+        {
+            foreach (var material in materials)
+            {
+                //We need to enable the EMISSION
+                material.EnableKeyword("_EMISSION");
+                //before we can set the color
+                material.SetColor("_EmissionColor", color);
+            }
+        }
+        else
+        {
+            foreach (var material in materials)
+            {
+                //we can just disable the EMISSION
+                //if we don't use emission color anywhere else
+                material.DisableKeyword("_EMISSION");
+            }
+        }
+    }
+}

Assets/Scripts/Effects/Highlight.cs.meta

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+fileFormatVersion: 2
+guid: 58e5a6d4728f393419100a54758a4e62