The best way is to create an image plane, then map Maya's leather texture to it. The leather texture is then edited to produce a random star pattern. In the Leather Attributes section, set: Cell Color to white; Crease Color to black; Cell Size to 0.001; Density to 0.015. When you render later, these settings will create a starry pattern. Maya's procedural textures can often be used to produce your desired effect. Hope this helps