I don't think you'd notice the difference, to be honest.
Btw I was thinking: wouldn't it be cool to have a little arena in Orcrest? Some hole in the ground with spikes where Orcish fighters battle against desert creatures and each other...
Do you think there's room for such a thing somewhere? Maybe even in a little ring outside Orcrest (though it would be better inside... perhaps a third ring?)
I'll fix the collision things, no problem. I'll see about the door frames, but I never needed one during testing... in fact it makes it more difficult, because it limits your possibilities when placing a house.
The is a nice Orcrest door (I think) that can be placed "into" the walls without looking unrealistic.
Yes, you are probably right, the curve of the walls would only be very slight anyway, so it wouldn't be worth it.
I did plan for a fight-pit Arena in the middle of the palace throne room. The current interior was custom made to include that.
Would you be interested in completely redoing the Orcrest palace interior with a new, better fight pit? It could be bigger, there is plenty of room inside the building.
Oh, I've also added some of your minotaur oxen to Orcrest--
http://img171.imageshack.us/img171/4744/anqminotaurox.jpg
Perhaps a hole in the ground with spikes at the edges... if Iliana likes it, I'll come up with a quick concept.
Dune palace interiors are as good as done. Here some more pics:
http://i189.photobucket.com/albums/z133/mr_siika/Elsweyr/interior/dunePalace01.jpg
http://i189.photobucket.com/albums/z133/mr_siika/Elsweyr/interior/dunePalace02.jpg
The palace throne room looks beautiful!

I've started looking at decorating the upper class Dune interiors and have decided on a style like this--
Cherim Hall where wealthy khajiit gather to socialise--
http://img40.imageshack.us/img40/3351/anqduneint01.jpg
Upper class house, with a little rope ladder up to sleeping loft--
http://img199.imageshack.us/img199/4314/anqduneint02.jpg
Could I request two more items!?
It would be really handy to have one of these room screen panels as a separate item which I could then also place in different locations as a furniture piece--
http://img29.imageshack.us/img29/1166/anqdunetrellice.jpg
Also I've managed to generate a decent landscape mesh for the LOD quad around Dune (after a couple of dozen tries mangling the base terrain). The only thing that is really needed is a flat square LOD object for the ground of the palace square. The actual ground is correct, but since the LOD only estimates it always subsides the steep edges
http://img171.imageshack.us/img171/6364/anqdunelod.jpg
How about door frames as a separate NIF, so they can be placed anywhere around the building, or even on multiple different building NIFs?
Yes, that is what I was thinking too. A separate door frame item for those lower class Dune houses would be handy. I have one of those for the Orcrest and Corinthe ones but it wouldn't really suit Dune even with a retexture.
I decided i'd do a bit of video recording, but i've never recorded any video in OB. i decided i'd give Riverhold the honor of being the setting for this http://www.youtube.com/watch?v=inXi2SVuUdk
lol. The town does have lots of nice big drops. Battling the locals with fireballs can be funny, from the upper levels you can send them flying into the air for miles!