Who knows, texture looks like straight from RPGmaker
Me, i know.
I drawn it myself, and i can prove it.

It's possible i'm inspired by some screens but i did not have look if what i saw was from RPG Maker. It is a good or bad thing what i drawn let you think it's from RPG Maker ?
I've attached example, this is what you talking about?
Yes, almost ! Where you see red circles, it should be the second corner, the one you can see it's visually connected with the other corner.
Where you see black circle, it should be the rounded corner, this is the issue i'm unable to solve.
The orange circle, is excatly the exemple of the zone where it must be sloped.
