A wall consists of a number of components whose display properties can be determined by the materials assigned to each component. When you assign materials to a wall style, you assign one material to each physical component of the wall. For example, you assign a wood or metal material to studs, concrete to a concrete component, and so on. You assign materials to components in each display representation where you want the materials to be used.
If you want to use the display properties of the wall style, instead of using material display properties, you can turn off the material assignments in the display properties of the wall style.
Material definitions consist of display components that correspond to component types of objects. For example, the Linework component of a material is used for all linework in plan view. The Surface Hatch component of a material is used to hatch all object surfaces in 3-dimensional (3D) model views and in elevations.