Well, with multitexturing, you can have 8 different textures on the one surface. They would all use the one uv set, but each can be scaled and rotated seperatly. And they use a blend mode, also can be individually defined, to draw the texture.
For instance, on a terrain, you might have a grass texture for the whole terrain. Then you could have another texture, scaled up more, for bits of plants. Then on top of that, another texture for a path or something.
For instance, on a terrain, you might have a grass texture for the whole terrain. Then you could have another texture, scaled up more, for bits of plants. Then on top of that, another texture for a path or something.