Using many YNI Surfaces as elements, I am building a practically new geometry that is closer to everyday reality than geometric surfaces based on strict, abstract axioms. Why can I claim this is so? Because, for example, they can be lined up like pixels, which makes the creation of an unbroken, organic surface possible, and in spite of its waviness can be regarded as practically even. If I compose it using a lot of elements, then shrink it, the waves will gradually become smaller, it becomes like a rough piece of paper that actually flattens out completely at the end. Using this method I build planes, cylinder-, cube- and spherical surfaces, then I highlight close-up partial images and create wall pictures. I call these 2D works Derivatives.