Working with Materials
From ZBrush Info
To work with materials in ZBrush, first make sure that the MRGB button (for color and material) or the M button (for material only) in the Draw Palette are pressed. Note that for many operations, the MRGB button is on by default.
Now select a material, choose a tool from the Tool palette that creates pixols, such as the SimpleBrush or a 3D tool such as Sphere3D, and start drawing. Whatever you draw will use the selected, or Active, material.
If you choose a different material, under normal circumstances nothing will change in the document, except anything you draw from then on will use the new material.
If you are working with a 3D object such as the Sphere3D or a polymesh, the new material will only be applied if the object is in Edit mode or the Move, Scale or Rotate Gyro is active. To paint particular materials on a 3D object, the materials must be embedded.
To Learn About Embedding Materials Click Here.
To Learn About Changing the Default Material Click Here.
To Learn About Using Material Modifiers Click Here.
