Move all furniture, curtains and rugs away from the wall. Cover with drop cloths.
Clean the wall with TSP and water. Wipe off the cleaner with wet rags and allow to dry completely.
Mask the ceiling, baseboards and around the edges of the accent wall with painter's tape. Place a drop cloth over the floor to protect it from paint spatters.
Repair any nail holes, dents or deep scratches with spackling paste before painting. Allow to dry according to the manufacturer's directions. Sand lightly with a 150-grit sandpaper and wipe with a tack cloth to remove all dust.
Paint the wall with a high-quality primer tinted to your selected wall color. Use a roller to do this. Touch up around the edges with a paintbrush. Allow to dry completely.
Mask the "grout" lines with 1/2-inch wide painter's tape. Allow the tape to extend past the planned accent wall so you can pull the tape off easily after painting. Use a spirit level to ensure that the lines are horizontal and vertical. Generally bricks are laid with each row staggered over the previously laid row, making an alternating pattern.
Stir the texture paint thoroughly. Pour the paint into the paint bucket. Hang the metal bucket grid inside the bucket.
Paint the wall in 4-by-4-foot sections with a rough-nap roller. Overlap the wet paint into the previously painted sections, as you paint the next section. Stir the paint regularly as you work. Allow the paint to dry according to the manufacturer's directions.
Pull the painter's tape off the grout lines slowly, pulling at a 45-degree angle. When all the tape is removed, allow the textured paint to dry for two days.
Paint the entire "brick" wall with the tinted primer, using a rough-nap roller and touching up with a paintbrush. Allow to dry completely.
Apply two coats of your final paint color to the accent wall, using a roller and paintbrush. Allow to cure for a week before placing any furniture or art against the wall.