Admit it you're impressed, I'm a fucking artist.
You couldn't cgi a better edge with what I started with which is also my fault lol
View attachment 152715
If that's a 90 you shoulda used one of these
ClarkDietrich 1-1/4 in. x 8 ft. Quicksilver Metal Corner Bead 741339 - The Home Depot
QUICKSILVER corner bead is a hot-dipped, highly durable galvanized bead. QUICKSILVER corner bead provides a high-quality finish and solid protection at drywall corners. This traditional drywall finishing
www.homedepot.com
Rookie mistake not to