Designing a surface for a concrete product was quite difficult, because of the material’s extreme variousness. Concrete tends to be “active” with a variety of surface tones. It is easy to achieve decorative patterns, but the vivid surfce hides the material itself. The biggest challange was to create a wide range of surface facilities, with the less supplementary working method, preserving the material own caracter. We create a minor texture on the skin of the object, witch is the modelling of the further errosion, and add some post treatment on it to look like slightly polished, graphite shine or aged, all these patterns are modelling the natural process.