I am remodeling a bathroom, and I only removed drywall where necessary. I have new drywall butting against existing walls and ceilings. I need advice on how to finish the joints between new and old. The existing ceiling is textured, and I'm expecially concerned about that area. Specifically, I'm assuming I have to tape the joint, so how do I do it? The existing ceiling is built up with compound and texture. Attached is a photo showing typical joined surfaces.