diff --git a/WFObj.cc b/WFObj.cc
index 9b88317..0dfe42b 100644
--- a/WFObj.cc
+++ b/WFObj.cc
@@ -202,9 +202,25 @@ void WFObj::processInputLine(const std::string & input)
     }
     else if (type == "usemtl")
     {
+        if (tokens.size() >= 2)
+            m_current_material_name = tokens[1];
     }
     else if (type == "mtllib")
     {
+        if (tokens.size() >= 2)
+            loadMaterial(tokens[1]);
+    }
+    else if (type == "s")
+    {
+        /* ignore smoothing */
+    }
+    else if (type == "g")
+    {
+        /* ignore group name */
+    }
+    else
+    {
+        cerr << "WFObj: warning: unhandled command '" << type << "'" << endl;
     }
 }