diff --git a/Scripts/SoftMask.cs b/Scripts/SoftMask.cs
index 5c505d2..b88b0f8 100644
--- a/Scripts/SoftMask.cs
+++ b/Scripts/SoftMask.cs
@@ -340,7 +340,10 @@ static void UpdateMaskTextures()
 		{
 			foreach (var sm in s_ActiveSoftMasks)
 			{
-				sm.UpdateMaskTexture();
+				if(sm)
+				{
+					sm.UpdateMaskTexture ();
+				}
 			}
 		}
 
diff --git a/Scripts/SoftMaskable.cs b/Scripts/SoftMaskable.cs
index 86f3793..834509d 100644
--- a/Scripts/SoftMaskable.cs
+++ b/Scripts/SoftMaskable.cs
@@ -158,11 +158,14 @@ static void UpdateSceneViewMatrixForShader()
 		
 			foreach (var sm in s_ActiveSoftMaskables)
 			{
-				Material mat = sm._maskMaterial;
-				if (mat)
+				if(sm)
 				{
-					mat.SetMatrix("_SceneView", w2c);
-					mat.SetMatrix("_SceneProj", prj);
+					Material mat = sm._maskMaterial;
+					if (mat)
+					{
+						mat.SetMatrix ("_SceneView", w2c);
+						mat.SetMatrix ("_SceneProj", prj);
+					}
 				}
 			}
 		}