From 8ddf9c29f316bae6b882eb13b94889d256a261b8 Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Tue, 15 Sep 2020 15:12:22 +0900
Subject: [PATCH] fix null in Renderer.sharedMaterials

---
 .../UniVRM/Editor/Format/VRMExporterVaildator.cs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Assets/VRM/UniVRM/Editor/Format/VRMExporterVaildator.cs b/Assets/VRM/UniVRM/Editor/Format/VRMExporterVaildator.cs
index 3a1fd6ea2..228cda250 100644
--- a/Assets/VRM/UniVRM/Editor/Format/VRMExporterVaildator.cs
+++ b/Assets/VRM/UniVRM/Editor/Format/VRMExporterVaildator.cs
@@ -327,9 +327,23 @@ namespace VRM
             }
 
             var renderers = ExportRoot.GetComponentsInChildren<Renderer>();
-            var materials = renderers.SelectMany(x => x.sharedMaterials).Distinct();
+            foreach (var r in renderers)
+            {
+                for(int i=0; i<r.sharedMaterials.Length; ++i)
+                if (r.sharedMaterials[i] == null)
+                {
+                    yield return Validation.Error($"Renderer: {r.name}.Materials[{i}] is null. please fix it");
+                }
+            }
+
+            var materials = renderers.SelectMany(x => x.sharedMaterials).Where(x => x != null).Distinct();
             foreach (var material in materials)
             {
+                if (material == null)
+                {
+                    continue;
+                }
+
                 if (material.shader.name == "Standard")
                 {
                     // standard