[Feature] Possibility to make corners for Slope and Slope Layers

[shawnyxx]

I was trying to make a roof for house and I got very mad because there was no mods as good as this one that had the possibility of making corners with slopes and vertical slopes (Just like stairs).

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
I want to be able to make corners out of Slopes and Slopes Layers...

Describe alternatives you've considered
Using stairs. Good, but not what I need.

Additional context