From fbec80c801fae3083d0494acbe19128ef547654a Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 29 Apr 2024 10:35:32 +0200
Subject: [PATCH] Fix error when using undo after removing Multi Blend node

---
 Source/Editor/Surface/Undo/AddRemoveNodeAction.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Source/Editor/Surface/Undo/AddRemoveNodeAction.cs b/Source/Editor/Surface/Undo/AddRemoveNodeAction.cs
index 300ca700f..2c72f041f 100644
--- a/Source/Editor/Surface/Undo/AddRemoveNodeAction.cs
+++ b/Source/Editor/Surface/Undo/AddRemoveNodeAction.cs
@@ -66,6 +66,8 @@ namespace FlaxEditor.Surface.Undo
             // Initialize
             if (node.Values != null && node.Values.Length == _nodeValues.Length)
                 Array.Copy(_nodeValues, node.Values, _nodeValues.Length);
+            else if (_nodeValues != null && (node.Archetype.Flags & NodeFlags.VariableValuesSize) != 0)
+                node.Values = (object[])_nodeValues.Clone();
             else if (_nodeValues != null && _nodeValues.Length != 0)
                 throw new InvalidOperationException("Invalid node values.");
             node.Location = _nodeLocation;