A concept of height-field is used for the design of UAF. Depending on the weight of given point, a planer surface is pulled down in Z axis. 3 gravity points pulls down the surface. X-Y distance from gravity point determines the degree of gravity. As further it goes, the Z-pull gets smaller, like ripple effect. When multiple vertical deformations intersect, it creates a dome-like space and canopy effect. Vertical columns are extended to the floor, thus being inside of the gallery feels like being under trees.