if you use version 2013, depending on the context menu in use and/or view, the commands that are not "active" with the specific action are "disabled".
if you are not in vsta 3d the rendering command is not active
if you use version 2013, depending on the context menu in use and/or view, the commands that are not "active" with the specific action are "disabled".
if you are not in vsta 3d the rendering command is not active