OgreImporter: Rewrote documentation for AI_CONFIG_IMPORT_OGRE_MATERIAL_FILE and AI_CONFIG_IMPORT_OGRE_TEXTURETYPE_FROM_FILENAME to reflect the current logic. And to be honest the earlier one was very confusing english and was not very clear what is happening with these config options.

include/assimp/config.h

@@ -801,29 +801,37 @@ enum aiComponent
 #define AI_CONFIG_IMPORT_IRR_ANIM_FPS				\
 	"IMPORT_IRR_ANIM_FPS"
 
-
 // ---------------------------------------------------------------------------
-/** @brief Ogre Importer will try to load this Materialfile.
+/** @brief Ogre Importer will try to find referenced materials from this file.
  *
- * Ogre Meshes contain only the MaterialName, not the MaterialFile. If there 
- * is no material file with the same name as the material, Ogre Importer will 
- * try to load this file and search the material in it.
+ * Ogre meshes reference with material names, this does not tell Assimp the file
+ * where it is located in. Assimp will try to find the source file in the following 
+ * order: <material-name>.material, <mesh-filename-base>.material and
+ * lastly the material name defined by this config property.
  * <br>
- * Property type: String. Default value: guessed.
+ * Property type: String. Default value: n/a.
  */
-#define AI_CONFIG_IMPORT_OGRE_MATERIAL_FILE "IMPORT_OGRE_MATERIAL_FILE"
-
+#define AI_CONFIG_IMPORT_OGRE_MATERIAL_FILE	\
+	"IMPORT_OGRE_MATERIAL_FILE"
 
 // ---------------------------------------------------------------------------
-/** @brief Ogre Importer detect the texture usage from its filename
+/** @brief Ogre Importer detect the texture usage from its filename.
  *
- * Normally, a texture is loaded as a colormap, if no target is specified in the
- * materialfile. Is this switch is enabled, texture names ending with _n, _l, _s
- * are used as normalmaps, lightmaps or specularmaps. 
+ * Ogre material texture units do not define texture type, the textures usage
+ * depends on the used shader or Ogres fixed pipeline. If this config property
+ * is true Assimp will try to detect the type from the textures filename postfix:
+ * _n, _nrm, _nrml, _normal, _normals and _normalmap for normal map, _s, _spec,
+ * _specular and _specularmap for specular map, _l, _light, _lightmap, _occ 
+ * and _occlusion for light map, _disp and _displacement for displacement map.
+ * The matching is case insensitive. Post fix is taken between last "_" and last ".".
+ * Default behavior is to detect type from lower cased texture unit name by 
+ * matching against: normalmap, specularmap, lightmap and displacementmap.
+ * For both cases if no match is found aiTextureType_DIFFUSE is used.
  * <br>
  * Property type: Bool. Default value: false.
  */
-#define AI_CONFIG_IMPORT_OGRE_TEXTURETYPE_FROM_FILENAME "IMPORT_OGRE_TEXTURETYPE_FROM_FILENAME"
+#define AI_CONFIG_IMPORT_OGRE_TEXTURETYPE_FROM_FILENAME \
+	"IMPORT_OGRE_TEXTURETYPE_FROM_FILENAME"
 
 /** @brief Specifies whether the IFC loader skips over IfcSpace elements.
  *