In ZBrush, the appearance of any object surface is a composite result of a variety of factors, such as the base color, the lighting effect of the texture image dropped onto the surface, and the material properties. The material can change the response of the illumination on the surface so that the model shows gloss, bump, reflection, metallic, or transparent effects. Zbrush® provides a number of pre-built materials to help users control the entire scene, as shown in addition, the user can modify each material to create a new material.
Material is not very important for engraving, but different materials can still make our work not rich and colorful, such as the performance of different materials.
In general, we are more commonly used in the carving of two materials, one is Matcap Gray, the other is flat Color, the former material is mainly in the sculpture to observe the shape and structure of the time use, the latter is in the observation of the shape silhouette effect and the production of reference template used, When replacing a material in ZBrush, it's easy to just click on the material we want.
ZBrush Tutorial: http://www.zbrushcn.com/support.html
Teach you the material of zbrush® software features