From 4b654848c8b8e017281a3f2daa61f8c2ec2dcf25 Mon Sep 17 00:00:00 2001
From: Nicholas Barlow <nickmaxx@gmail.com>
Date: Tue, 11 Jun 2019 15:24:55 -0700
Subject: [PATCH] Addressing regression introduced via #472. _getSpecialTexmap
 can dereference a null texMap if the material lacks a
 diffuse/specular/normal/specular map. Adding a null check in
 _getSpecialTexmap should fix this.

---
 3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs b/3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs
index c4ee5568..bf643631 100644
--- a/3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs	
+++ b/3ds Max/Max2Babylon/Exporter/BabylonExporter.Texture.cs	
@@ -513,6 +513,12 @@ private BabylonTexture ExportEnvironmnentTexture(ITexmap texMap, BabylonScene ba
 
         private ITexmap _getSpecialTexmap(ITexmap texMap, out float amount)
         {
+            if (texMap == null)
+            {
+                amount = 0.0f;
+                return null;
+            }
+
             if (texMap.ClassName == "Normal Bump")
             {
                 var block = texMap.GetParamBlockByID(0);        // General Block