Javadoc
Convenience method which assists in rendering portions of the
OpenGL texture to the screen as 2D quads in 3D space. Pushes
OpenGL state (GL_ENABLE_BIT); disables lighting; and enables the
texture in this renderer. Unlike
#beginOrthoRendering, does not modify the depth test, back-face
culling, lighting, or the modelview or projection matrices. The
user is responsible for setting up the view matrices for correct
results of
#draw3DRect.
#end3DRendering must be used in conjunction with this method to
restore all OpenGL states.