From 05de65cf9e1316a97dbc9732c50682dd018ff6d6 Mon Sep 17 00:00:00 2001
From: Harald Csaszar <harald.csaszar@pixelcloudgames.com>
Date: Tue, 19 Dec 2023 16:38:16 +0100
Subject: [PATCH] [unity] Fixed SkeletonRenderSeparator with
 CustomMaterialOverride potentially throwing ArgumentNullException. Closes
 #2435.

---
 .../Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs  | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs b/spine-unity/Assets/Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs
index d5c260523..eda03e9db 100644
--- a/spine-unity/Assets/Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs	
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Mesh Generation/MeshGenerator.cs	
@@ -458,6 +458,8 @@ namespace Spine.Unity {
 			SubmeshInstruction[] wsii = workingSubmeshInstructions.Items;
 			for (int i = 0; i < workingSubmeshInstructions.Count; i++) {
 				Material material = wsii[i].material;
+				if (material == null) continue;
+
 				Material overrideMaterial;
 				if (customMaterialOverride.TryGetValue(material, out overrideMaterial))
 					wsii[i].material = overrideMaterial;