Hello All, my Question is: How can I visible chock block after Shut Off the Engine. And How can I unvisible the chock after Start the Engine. Can I do this, or must I do This with Animation in GMax and when it is, how can I do This. Many many thanks with your help. When anyone has a link to a tutorial, I will read and learn. I Know to open and close a door to animate, but no knowing over visible/unvisible.