There's already been quite a few (and rightly so) complaints about the low skybox in the Twin Arches property preventing you to go onto the roof (though you can still build on it) and I'd like to point out another problem, this time with an interior Invisi-Ceiling. In Hammerdeath Bungalow, there is a pretty cool interior eaves going on where you could very easily build an attic or second floor. Unfortunately, testing it this evening with a set of planks, I discovered that you can not go beyond this pre-set eaves line. (If it is called something else, my apologies) This means, you can again, place objects, but you can't go beyond this Invisi-Ceiling.
A bit disappointing - and bizarre, given there isn't any view as Hammerdeath has no outdoors.
I'm sure there are other properties besides Twin Arches and Hammerdeath Bungalow that have some invisi-blocks to areas that would be considered buildable. In the spaces that have no outdoors, there's no need for these to exist beyond the confines of the viewable instanced space.
Imagine a sweet roll, but it's a pizza.The holy pizzerati welcomes anyone for a cheese slice.