I have put a free gated arch model up on the Store. It is a part of my Cellar Kit pack.
As can be seen in the pictures below and the video using the pack it is possible to make both complex and simple cellars quickly. I will add some stairways, slopes etc to the pack later to allow for multi-level cellars. As these will be added to the pack they will be available to purchasers at no extra cost.
