Some surfaces can have both glossy and matte areas. In order to achieve that effect, we can use specular maps.
For illustration purposes, we will create a rusted metal material to demonstrate how the specular property can be used to enhance realism. If you don't have a base texture to develop into a specular material, please use the one included in the book's
0423_03_03 content folder.
To create a specular material, follow these steps: