From d3d6932efdaac3dca798ac295723b7187154e0e7 Mon Sep 17 00:00:00 2001
From: Grayson Lang <graysonlang@gmail.com>
Date: Wed, 17 Aug 2016 13:30:25 -0700
Subject: [PATCH] Fix MTL "transmission filter" token

The "transmission filter" is currently set to Kt, which is undocumented. Adding support for the specified token of "Tf".
---
 tiny_obj_loader.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tiny_obj_loader.h b/tiny_obj_loader.h
index c77ffc8..02ef7b0 100644
--- a/tiny_obj_loader.h
+++ b/tiny_obj_loader.h
@@ -802,7 +802,8 @@ void LoadMtl(std::map<std::string, int> &material_map,
     }
 
     // transmittance
-    if (token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2]))) {
+    if ((token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2])))
+        || (token[0] == 'T' && token[1] == 'F' && IS_SPACE((token[2])))) {
       token += 2;
       float r, g, b;
       parseFloat3(r, g, b, token);