You know, the two screenshots made me realize that the issue of interiors in NWN could have been so easily solved by static mesh walls and a floor board texture. Any time you entered a building in both games, it required an area transition, which was very wasteful (especially in NWN 2, where you could suffer transition crashes as the buffer didn't release fast enough).
Sorry, just some musing on a ~10 year old question that should have been so easy to answer.
Anyway, It's good that you're making your own engine. I'm really looking forward to seeing what the toolset can do, especially code wise. Do you have a custom scripting language, or are you using a full programming language like C#, C++ etc? Hopefully we get more than just a trigger assortment to work with
