Rendering is a process of applying a coat of plaster to a wall or other surface. It is a common form of wall finishing and is often used to create a smooth, even surface. Rendering can also be used to create decorative effects, such as adding texture or color to a wall. The coat of plaster is usually applied in two layers, with the first layer being a base coat and the second layer being a finish coat. The finish coat is then sanded and polished to create a smooth, even surface.