More accurate please

I'm quite new to OGRE, hence I don't want to edit the article, but I feel some things should be corrected.

• To use .scene file you have to use the dotSceneFormat and/or the dotSceneOctree add-on. Also the very same can be archived without any of these add-ons (an with some extra work).

Shinjin 09:47, 8 Apr 2005 (CDT)

Limitations of heightmaps

Actually, caves are possible with heightmaps: just create two and turn one upside down. --Remco 14:33, 16 April 2007 (BST)