Added support for texture layer.
Added support for texture layer.


ghub/osg,artoolkit/osg,omega-hub/osg,artoolkit/osg,ntoand/osg,XiaoCC/osg,XiaoCC/osg,omega-hub/osg,XiaoCC/osg,stmh/osg,ghub/osg,ntoand/osg,ntoand/osg,ghub/osg,omega-hub/osg,XiaoCC/osg,artoolkit/osg,koshman86/osg,koshman86/osg,XiaoCC/osg,stmh/osg,koshman86/osg,ntoand/osg,ghub/osg,stmh/osg,koshman86/osg,stmh/osg,stmh/osg,omega-hub/osg,artoolkit/osg