Index: /OpenSceneGraph/trunk/src/osgPlugins/3ds/ReaderWriter3DS.cpp
===================================================================
--- /OpenSceneGraph/trunk/src/osgPlugins/3ds/ReaderWriter3DS.cpp (revision 9637)
+++ /OpenSceneGraph/trunk/src/osgPlugins/3ds/ReaderWriter3DS.cpp (revision 9906)
@@ -822,5 +822,5 @@
     }
 
-    if (transparency>0.0f || textureTransparancy)
+    if (transparency>0.0f || textureTransparancy || mat->opacity_map.flags!=0)
     {
         stateset->setMode(GL_BLEND,osg::StateAttribute::ON);