Real Texture: A real texture is the actual texture of a form. Usually artists create real textures in art forms to impart visual interest. A piece of pottery can have a rough texture to depict its natural character or be given a smooth texture by glazing technique.
Implied Texture: It is not the real texture (three dimensional textures) it is a visual impression of a texture. For example a sketch of a tree bark may look real but actually the rough texture of the bark has been created by shading on a piece of paper.