This method therefore simulates the effect of light on a textured surface without the necessity of actually working all that detail into geometry of the model. The previous example looks very much the one before it, and I have presented it to stress that bump mapping is ultimately another method for varying the surface color of a object. Bump mapping really begins to distinguish itself from other methods of creating texture when we apply the right kinds of maps. A blurry map, such as we have been using thus far, creates vague textures. But more sharply defined maps, with strong contrasts, will bring out strong relief.
Fine texture is evident only on images of at least a minimum size.
The bump map here is a procedural map that creates a crinkled paper effect. Notice how much more convincing the texture is on the sphere than it is on the text. A curved surface necessary reveals more texture than a flat one. As the underlying diffuse color gets darker, the relief effect of bump mapping is reduced. Look at this example using a slightly different mapping pattern.