From 856d4c016ef0ad7434aee2c2c388bd5713a0f223 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Tue, 10 Nov 2020 10:03:09 +0100
Subject: [PATCH] closes https://github.com/assimp/assimp/issues/3448

Add transmission alpha value. if any.
---
 code/AssetLib/Obj/ObjFileMtlImporter.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/code/AssetLib/Obj/ObjFileMtlImporter.cpp b/code/AssetLib/Obj/ObjFileMtlImporter.cpp
index 6464a55e0..9e45a0ce2 100644
--- a/code/AssetLib/Obj/ObjFileMtlImporter.cpp
+++ b/code/AssetLib/Obj/ObjFileMtlImporter.cpp
@@ -137,10 +137,14 @@ void ObjFileMtlImporter::load() {
             } break;
             case 'T': {
                 ++m_DataIt;
-                if (*m_DataIt == 'f') // Material transmission
-                {
+                // Material transmission color
+                if (*m_DataIt == 'f')  {
                     ++m_DataIt;
                     getColorRGBA(&m_pModel->m_pCurrentMaterial->transparent);
+                } else if (*m_DataIt == 'r')  {
+                    // Material transmission alpha value
+                    ++m_DataIt;
+                    getFloatValue(&m_pModel->m_pCurrentMaterial->alpha);                    
                 }
                 m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
             } break;