Texture Handling Options
Materials with Explicit Textures
The simplest way of specifying textures to have separate materials that each explicitly declare the textures they need to use as strings parameters of the shaders. Each object that needs a different texture is simply assigned the relevant material.
Though this is simple it lacks flexibility. In particular it's common to want to be able to use the same material on multiple objects, but with each object picking up its own the textures.