Call UpdateMaaterialProperties after enabling/disabling lighting. SetVisibilityWindow: Don't call UpdateMaaterialProperties of value didn't change.

Assets/Scripts/VolumeObject/VolumeRenderedObject.cs

@@ -76,9 +76,13 @@ namespace UnityVolumeRendering
             return lightingEnabled;
         }
 
-        public void SetLightingEnabled(bool enable)
-        {
-            lightingEnabled = enable;
+        public void SetLightingEnabled(bool enable)
+        {
+            if (enable != lightingEnabled)
+            {
+                lightingEnabled = enable;
+                UpdateMaaterialProperties();
+            }
         }
 
         public void SetVisibilityWindow(float min, float max)
@@ -88,8 +92,11 @@ namespace UnityVolumeRendering
 
         public void SetVisibilityWindow(Vector2 window)
         {
-            visibilityWindow = window;
-            UpdateMaaterialProperties();
+            if (window != visibilityWindow)
+            {
+                visibilityWindow = window;
+                UpdateMaaterialProperties();
+            }
         }
 
         public Vector2 GetVisibilityWindow()
@@ -113,11 +120,11 @@ namespace UnityVolumeRendering
                 meshRenderer.sharedMaterial.DisableKeyword("TF2D_ON");
             }
 
-            if(lightingEnabled)
-                meshRenderer.sharedMaterial.EnableKeyword("LIGHTING_ON");
+            if(lightingEnabled)
+                meshRenderer.sharedMaterial.EnableKeyword("LIGHTING_ON");
             else
-                meshRenderer.sharedMaterial.DisableKeyword("LIGHTING_ON");
-
+                meshRenderer.sharedMaterial.DisableKeyword("LIGHTING_ON");
+
             switch (renderMode)
             {
                 case RenderMode.DirectVolumeRendering: