diff --git a/src/osgPlugins/3ds/WriterNodeVisitor.cpp b/src/osgPlugins/3ds/WriterNodeVisitor.cpp
index 75946897b..e2e1833b9 100644
--- a/src/osgPlugins/3ds/WriterNodeVisitor.cpp
+++ b/src/osgPlugins/3ds/WriterNodeVisitor.cpp
@@ -503,12 +503,12 @@ WriterNodeVisitor::WriterNodeVisitor(Lib3dsFile * file3ds, const std::string & f
     osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
     _succeeded(true),
     _srcDirectory(srcDirectory),
-    file3ds(file3ds),
+    _file3ds(file3ds),
     _currentStateSet(new osg::StateSet()),
     _lastMaterialIndex(0),
     _lastMeshIndex(0),
     _cur3dsNode(NULL),
-    options(options),
+    _options(options),
     _imageCount(0),
     _extendedFilePaths(false)
 {
@@ -531,7 +531,7 @@ WriterNodeVisitor::WriterNodeVisitor(Lib3dsFile * file3ds, const std::string & f
 void WriterNodeVisitor::writeMaterials()
 {
     unsigned int nbMat = _materialMap.size();
-    lib3ds_file_reserve_materials(file3ds, nbMat, 1);
+    lib3ds_file_reserve_materials(_file3ds, nbMat, 1);
     // Ugly thing: it seems lib3ds_file_insert_material() doesn't support insertion in a random order (else materials are not assigned the right way)
     for (unsigned int iMat=0; iMat<nbMat; ++iMat)
     {
@@ -580,7 +580,7 @@ void WriterNodeVisitor::writeMaterials()
                 if(_imageSet.find(mat.image.get()) == _imageSet.end())
                 {
                     _imageSet.insert(mat.image.get());
-                    osgDB::writeImageFile(*(mat.image), path);
+                    osgDB::writeImageFile(*(mat.image), path, _options);
                 }
                 // Here we don't assume anything about initial flags state (actually it is set to LIB3DS_TEXTURE_NO_TILE by lib3DS, but this is subject to change)
                 if (mat.texture_transparency) tex.flags |= LIB3DS_TEXTURE_ALPHA_SOURCE;
@@ -590,7 +590,7 @@ void WriterNodeVisitor::writeMaterials()
             }
             if (!succeeded())
                 return;
-            lib3ds_file_insert_material(file3ds, mat3ds, itr->second.index);
+            lib3ds_file_insert_material(_file3ds, mat3ds, itr->second.index);
             break;        // Ugly thing (3)
         }
         assert(found);        // Ugly thing (4) - Implementation error if !found
@@ -795,11 +795,11 @@ WriterNodeVisitor::buildMesh(osg::Geode        & geo,
             mesh->texcos[it->second][1] = vecs[it->first.first][1];
         }
     }
-    lib3ds_file_insert_mesh(file3ds, mesh, _lastMeshIndex);
+    lib3ds_file_insert_mesh(_file3ds, mesh, _lastMeshIndex);
     ++_lastMeshIndex;
 
     Lib3dsMeshInstanceNode * node3ds = lib3ds_node_new_mesh_instance(mesh, mesh->name, NULL, NULL, NULL);
-    lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(_cur3dsNode));
+    lib3ds_file_append_node(_file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(_cur3dsNode));
 }
 
 unsigned int 
@@ -1066,7 +1066,7 @@ void WriterNodeVisitor::apply3DSMatrixNode(osg::Node &node, const osg::Matrix *
         node3ds = lib3ds_node_new_mesh_instance(NULL, getUniqueName(node.getName().empty() ? node.className() : node.getName(), prefix).c_str(), NULL, NULL, NULL);
     }
 
-    lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(parent));
+    lib3ds_file_append_node(_file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(parent));
     _cur3dsNode = node3ds;
 }
 
diff --git a/src/osgPlugins/3ds/WriterNodeVisitor.h b/src/osgPlugins/3ds/WriterNodeVisitor.h
index 76743f8b6..ebf7471ad 100644
--- a/src/osgPlugins/3ds/WriterNodeVisitor.h
+++ b/src/osgPlugins/3ds/WriterNodeVisitor.h
@@ -201,7 +201,7 @@ class WriterNodeVisitor: public osg::NodeVisitor
         bool                                _succeeded;
         std::string                         _directory;
         std::string                         _srcDirectory;
-        Lib3dsFile *                        file3ds;
+        Lib3dsFile *                        _file3ds;
         StateSetStack                       _stateSetStack;
         osg::ref_ptr<osg::StateSet>         _currentStateSet;
         std::map<std::string, unsigned int> _mapPrefix;            ///< List of next number to use in unique name generation, for each prefix
@@ -210,7 +210,7 @@ class WriterNodeVisitor: public osg::NodeVisitor
         unsigned int                        _lastMaterialIndex;
         unsigned int                        _lastMeshIndex;
         Lib3dsMeshInstanceNode *            _cur3dsNode;
-        const osgDB::ReaderWriter::Options* options;
+        const osgDB::ReaderWriter::Options* _options;
         unsigned int                        _imageCount;
         bool                                _extendedFilePaths;
         std::set<osg::Image *>              _imageSet;