However, a coarser mesh can be made to look more natural with smoothing and Gouraud shading. For example, the right cylinder in figure 4A is made with a coarser mesh and contains half as many faces as the left one. In image B, the cylinders are smoothed, in A they aren't. Texture mapping can also be used to camouflage coarse meshes or to bring realism to a surface. At Ethan Allen stores, for example, texture maps are created by scanning samples of fabrics into a computer.
Texture maps add realism to an object, for example, by making the sofa look as if it is upholstered.
As another example, a designer would have to draw many polygons of various colors onto the floor of figure 5 in order to simulate a carpet finish. However, designers should keep in mind that texture maps take long to render. If too many texture maps are used, the frame update rate will decrease substantially. Illuminating the Space Lighting may be more important to designers than to other virtual world builders since it is part of the design profession to be aware of its effects. There are programs, such as Lightscape, Luxicon or Radiance, that use dynamic lighting calculations to accurately portray indoor lighting.