Design

• A basic reason to texture drywall is the dramatic effect, and visual appeal, it gives a wall or ceiling, as opposed to the flat appearance of drywall that is sanded and left smooth. To change the particular appearance of the texture, use either fine grains or more coarse grades of texture. Texture also allows you the option of either leaving the grains in place, or flattening them down with a trowel or taping knife, which is known as "knock down" texture. Texture provides a way to keep walls and ceilings from appearing plain.
  
  

Erases Imperfections

• Texture also covers up and hides any imperfections in the drywall, such as warps or uneven areas, that would be easily noticed if the walls or ceiling is left smooth, or wallpaper is installed over walls. The texture basically makes an imperfect drywall taping and finishing job look better. Light that hits "smooth" walls and ceilings exposes uneven spots, even if these same spots feel smooth and even to your touch. The effect of texture hides these variations, allowing for a more uniform appearance.
  
  

Warmth

• Outside of the visual style of a textured wall or ceiling over a smooth one, texture provides a sense of warmth to a room. Instead of giving the appearance of a flat, cold container that, for example, glossy gray walls and ceilings emit, the personality of textured walls and ceilings blend and connect with the furniture and other decorations inside a room. You can also apply texture in a variety of colors to better complement the room.
  
  

Hides Damage

• Of course, if cracks or holes occur in a drywall surface, whether accidentally or otherwise, you should repair the damage, which can occur at any time after installation. In addition, small scratches, marks or dings occur, especially on walls, and are not as pressing to repair. However, a textured surface hides this minor damage much better than a smooth surface, which allows even small marks and scratches to stand out.