So I recently had the idea of having a sloping interior, like take any old normal interior... we will say Arobar manor, for example; but instead of how it normally is built it instead has a sloping floor. Not a huge one, but a slanting 15-20 degrees.

AFAICT, there is no way to do this unless you do it by hand, place each redoran (arobar manor example) static piece by hand, line up the angle and the connection (no overlaps, no gaps) by hand. perhaps you could use the snap to angle, but still it would be by hand.

Is there an easier way? Utility? Or will it have to be by hand.

ST

Why not make it flat using snap to grid and then rotate the whole thing?

Might be possible, but sometimes some things rotate on their own without moving properly with all other objects as we want them to.

Just rotate once piece at a time, correcting on the Z axis as you go.

Considering how easy it is to do, I'm surprised more people haven't done it.

A problem that can occur is with collision. Some floor (especially staircases) get their collision messed up when rotated too much.

The problem with this is the z-axis could be very hard to get right. I seem to remember that in Morrowind things rotate properly around their centre when selected as a group.

When you select objects as a group and rotate them, it often ends up looking like venetian blinds, Foir instance, you can make a kind of sofa by assembling vanilla cushions. You can move it around and it's okay, but if you rotate it, it gets very strange...

And the NPCs will walk right?? :unsure:

Only objects in space are slopped, not actual space It's the same thing as shipwrecks in original Morrowind, they are slopped, not you, so you walk normally.

That ^
It will be tedious and time consuming, but I've done it before.

Another thing to do that is a bit less time consuming is to simply place a step or something where each peice meets then you dont have to line them up perfectly. In otherwords, just cover the seam.

You'll have to be carefully about where you place them, to make sure they can line up properly. May also have to scale them up.

Depending on the size of the interior, you may want to look at importing all the tiles into a modeling program, or NifSkope, and turning them into one model you can rotate as a whole.

I'd say the quickest way would be to ONLY place the large statics, like the peices that make up the room/s first... THEN rotate to the preferred angle, and then start populating it with crap.

I will add a caveat - one that I ran into while doing a shipwreck. If you rotate normal doors (and door frames), keep in mind that the player (and NPC's) walk straight, and sometimes that can mean accidentally blocking the character. This is bad enough walking, but it gets substantially worse if the player or NPC is swimming.

I have a shipwreck rotated about 20 degrees about the Z, and an additional 15 along the X. This puts a portion of the lower deck just slightly above water, but the rest of the lower deck underwater. Attempting to swim into the original shipwreck caused you to get stuck in the door frame. I had to enlarge the door frame quite a bit before I fixed this.