Questions related to the use of the Ogre3D (Object-Oriented Graphics Rendering Engine) rendering engine and tools are appropriate for this tag.
Ogre3D is an open-source, object-oriented scene graph based rendering engine, distributed under the MIT license. It has OpenGL and Direct3D support. Ogre3D SDKs are available for Windows, Mac OS X / iOS, Linux, Android and Windows Phone.
Official website: http://www.ogre3d.org
Official forum: http://www.ogre3d.org/forums
Wikipedia entry: http://en.wikipedia.org/wiki/OGRE
Browse the source: https://bitbucket.org/sinbad/ogre/src