diff --git a/include/osg/StateSet b/include/osg/StateSet
index e40626bf4..2bbe260ad 100644
--- a/include/osg/StateSet
+++ b/include/osg/StateSet
@@ -222,6 +222,8 @@ class OSG_EXPORT StateSet : public Object
         /** return the const list of all Texture related GLModes contained in this const StateSet.*/
         inline const TextureModeList& getTextureModeList() const  { return _textureModeList; }
 
+        /** Return the number texture units active in the TextureModeList.*/
+        inline unsigned int getNumTextureModeLists() const { return _textureModeList.size(); }
 
         typedef std::vector<AttributeList>  TextureAttributeList;
 
@@ -257,6 +259,9 @@ class OSG_EXPORT StateSet : public Object
         /** Return the const list of all Texture related StateAttributes contained in this const StateSet.*/
         inline const TextureAttributeList& getTextureAttributeList() const { return _textureAttributeList; }
 
+        /** Return the number of texture units active in the TextureAttributeList.*/
+        inline unsigned int getNumTextureAttributeLists() const { return _textureAttributeList.size(); }
+
 
         void setAssociatedModes(const StateAttribute* attribute, StateAttribute::GLModeValue value);
         void removeAssociatedModes(const StateAttribute* attribute);