Use a screwdriver to remove all ceiling fixtures. Move out any furniture and spread out tarps.
Brush ceiling primer along the edges of the ceiling with a paintbrush. Use a roller to cover the rest of the ceiling with primer. Allow it to dry overnight.
Use a paintbrush to apply textured paint along one edge of the ceiling, spanning 5 feet to 6 feet. Use a roller to cover 10 square feet to 15 square feet on the ceiling. Apply the paint slowly and spread it out evenly.
Move to the next section and repeat the process, brushing textured paint along the edge and then out into the middle of the ceiling.
Repeat, working in sections and blend them together at the perimeter. Step back after applying each section to make sure it appears consistent.