@Auroraskies, I would write you an essay if you needed it, no problem :dizzy:
As for the "diagonal pillars", you will quickly see from the build download that it is basically a staircase with a concrete side and a roof over it, si it is "hollow". That one is actually still a bit tricky to pull off, even if you know what it is made of.
In the build below, I picked the easy way out and placed the roof behind the staircase, stretching the eaves over it to the front. If you place them directly in front (try to), you get an error, because sims are supposed to like... walk there and stuff... apparently....
https://athena.thesims.com/v1/images/1/0x00000e91/4C1322D8-0A5D-11EB-8CE0-B16ACE59D5D9/00.jpg
I didn't want to do that with the Gubal Library, since I would lose much of the effect of the 'pillars'. I ended up drawing an 'elevator' room on the ground floor (it is basically a normal freestanding room which you raise and lower to reach the specific height you are looking for). I needed it on the ground floor, since this was the only floor where I didn't have rooms on the location where I needed the roof. If you have rooms, it will say you cannot place the roof inside a building, doesn't matter whether it is lower or higher, still counts as that 'floor'.
if you still have trouble conceiving the 'elevator room', it's also what I use for the drawing of the stuff on the front of my builds and I made a really bad tutorial on this, don't judge me :'(
https://youtube.com/watch?v=LwHYSgsLqCg&t=5sI placed my tiny roof on the 'elevator' room , extended the eaves up as far as they would go and placed the roof diagonally under the staircase (where I built the horizontal beams anyway, so they wouldn't show there in any case) so that the eaves connect directly to the upper part of the staircase railing. I matched the color of the staircase base/railing/eaves as close as possible to get a cohesive look for the beam.
On the upper level of the staircase, I had to build the wall around the natural 'opening' the sims leaves for people like...walking ... on...it, like that ever happens :O so i freeplaced a window in the opening and hid the hole created in the floor with the debug concrete tiles.
A tiny bonus: because the roof is placed on a floor UNDER the staircase, you never actually see the stairs of the staircase, since the roof shows up first when you raise floors :D
Aaaand apparently I did actually write you an essay now, woops :D
