This one I found by accident, notice in the screenshot that I have a Shroud Broadleaf plant that's clipping through the rocks that are part of the Glade Cottage Wall (Stone). It's not possible to place them there normally, you have to remodel your house to a different wall (I used Composite), place the plant, and then change it back to Stone. I guess this means that the Stone-type wall has a slightly larger collision radius than the Composite one.
http://i.imgur.com/HY5sp7h.jpg
Some other misc. screenshots someone might find useful,
Diagnostics Module around a Glade Pillar
http://i.imgur.com/skYCMnE.jpg
Made a kitchen for the housing NPCs to stand around in, looks more natural. The exhaust pipe for the Manor Oven is hidden inside the Glade Pillar.
http://i.imgur.com/ofTaDQM.jpg
Yes, that's supposed to be a toilet. It's an Oasis Stool and Walnut Cartonnier.
http://i.imgur.com/c4KG6Rx.jpg
