Rules for Painting Ceilings: Roll Both Directions First, work in sections about 5 or 6 ft. square. Move quickly from one section to the next to make sure the paint along the edge doesn't dry before you roll the adjoining section. This is called “keeping a wet edge” and is the key to avoiding lap marks.
Always perpendicular to the wall with the light source (in your example, you paint from wall A to further away). You do this in case your coats are not even, the light will reduce the imperfections instead of casting a shadow at each roll pass.
Paint in One Direction Always
This technique lends a uniformity to your paint job that will make it look professional.
It's best to work away from any light source, so start near the largest window, this will make sure you can see where you've painted and don't get any “misses”. “Cut in” around the edges of your ceiling with a medium sized brush (a 2-inch synthetic bristle brush is ideal).
Cover any life safety systems (smoke detectors, co2 detectors, and fire sprinklers) as they are not meant to be decorated and paint particles can inhibit their operation. Also, remove any ceiling fixtures and tape the wires. This will, again, make sure that the drywall is completely covered.
Paint in Sections With a Roller
The best way to paint a ceiling is to use a paint roller and work in grid-like sections of 3 square feet to 5 square feet each. This helps keep edges wet and allows you to see your progress to ensure an even coat. For smooth ceilings, use a low nap roller.
Uneven paint can cause a space to look unfinished, whereas a well-painted smooth ceiling gives a polished feel. Patchy ceilings can also be caused by streaks from the paint roller, brush marks or stipple from an uneven roller.
Ideally, you would want a North facing window above your easel at about 35° angle from your canvas, so you get directional light on the canvas without getting glare. Glare is most prominent if you are painting vertically with oil paints.
Cause. This is caused usually by a wearing away of the paint film by weathering or could be evidence of salts coming out of the surface.
Always cut in first then continue painting with a roller. Cut in and paint with a roller one wall at a time. If you cut in all areas first and then roll the entire room, the paint that was applied when cutting in will have dried quicker and you will be left with a patchy, uneven finish.
It is common for an artist to turn a painting upside down during art creation. It can be used to apply different techniques or just to get a different perspective as the painting is established. In abstraction, it is customary to turn the paintings around least ten times before completion.
Direction: Choose the east, north and northeast wall to place the painting.
Roll from the middle of the room in the direction of the light. Each time this step is completed you should have enough paint to cover about a 1 metre width of an average size bedroom ceiling. Periodically back roll the previously painted area using only the weight of the roller to deliver a smooth finish.
Paint in a 'W' motion to ensure an even distribution across your wall.
Rules for Painting Ceilings: Roll Both Directions
square. Move quickly from one section to the next to make sure the paint along the edge doesn't dry before you roll the adjoining section. This is called “keeping a wet edge” and is the key to avoiding lap marks.
From the point of view of your upper back and neck, the best position for painting or drawing is standing at an easel. This means that you are working on a vertical surface and this creates very little strain on your upper back and neck.
Paint From Dark to Light
Do not jump around. It is easier to see your object develop if you paint in the darkest colors first, and then move on to the next value, and then the next, and so on.
Angled Towards the Subject (green): When the light approaches the subject from either side of the camera, shadows are created, and shape/texture become more apparent. The width of the shadows increases as the direction of the light moves from the camera out to the side.
After painting the edges of the ceiling with a brush, you can use a roller. When deciding which direction to paint a ceiling, start at a corner of the ceiling and roll toward a window so you can see the light from the window reflecting off the wet paint.
The rule of thirds means that the subject isn't centered; rather, the main focal point can be to one side or at the top or bottom of the image. It's a tool to help artists draw the viewer's eye into the composition, rather than just glancing at the center.
Whether you paint in sections from top to bottom or from side to side across the room is up to you. But if you're using an extension handle on your roller, you may find it more convenient to start at one high corner and go all the way across the room with a series of completed zigzag patterns.
Ceilings and Drywall - Medium 3/8″ roller covers work best. Walls, Wood, and Metal - Small 1/4″ roller covers or foam rollers will produce the smoothest finish. Light to Medium Textured Surfaces - Microfiber rollers are best. Smooth Surfaces - Use a white woven short nap roller for an ultra fine finish.
To avoid making marks on the ceiling with your roller, reduce the amount of paint you use. If you notice roller marks appearing, re-roll the areas to smooth them out using very light pressure. Another method to avoid roller marks is to add another coat of paint in the opposite direction for the second coat of paint.