If you're looking to create a unique vibe in a room, consider rounded drywall corners. Rounded corners give a soft, adobe-like look to a room and a more finished look to trimless open doorways.

You want the same 1/16 inch of joint compound between the tape and the drywall. I use a 5-inch-wide flexible taping knife to do this. You need to round off the corners of a new knife with a metal ...