https://steamcommunity.com/sharedfiles/filedetails/?id=2464017184

https://steamcommunity.com/sharedfiles/filedetails/?id=2464017003

Arches like this are in the base game. I run no mods at all if you want to check my screenshots.

Thanks for your reply, guys 'n gals.

I was not looking for the arcs you showed in your screenshots, @GunsForBucks, but somebody tilted the regular 2x1 stone bars so that they form an arch.

I guess I won't be able to do that then, as I intend to play without mods.

Thanks again for your help.

Edit: I also wished for that the developers would add the vertical tilt, @TehJumpingJawa

Rotating on anything but the vertical axis requires mods.
Additionally, free-rotation on the vertical axis also requires mods.
Scaling components also requires mods.

There are a couple of arch-like components that are unlocked later (such as the arched double doorway), perhaps that's what you've seen?

I hope the devs allow rotation on more axes (and possible scaling) , as it'd allow for drastically more sophisticated constructions without needing to unnecessarily inflate the construction palette.
In fact additional rotation & scaling controls would allow the construction palette to be shrunk, as a significant portion of the existing components would become redundant.

Originally posted by TehJumpingJawa:

In fact additional rotation & scaling controls would allow the construction palette to be shrunk, as a significant portion of the existing components would become redundant.

While true, I would hope that the existing palette remains as is. While you could indeed rotate a vertical beam for example to be horizontal, having to do so every time you want a horizontal beam would be annoying.

Originally posted by Shurenai:

Originally posted by TehJumpingJawa:

In fact additional rotation & scaling controls would allow the construction palette to be shrunk, as a significant portion of the existing components would become redundant.

While true, I would hope that the existing palette remains as is. While you could indeed rotate a vertical beam for example to be horizontal, having to do so every time you want a horizontal beam would be annoying.

You could easily have hotkeys that snap to common orientations.