The project Gradual Fields deals with the subject of gradually changing field like structure and its influence on the surrounding area. For this purpose a modular assembly method is developed. The modules are linked by topological interlocking and as a Bell kite system. The goal of the research is to minimize the modules to such a degree that they allow for a transition between open and closed conditions while the structure still functions as an interlocking assembly.This differentiated surface controls the environmental factors via its gradual openings and thus creates a heterogeneous space. The ambition of the project is to control environmental factors with the help of a modular assembly system and to create different spatial situations under constant factors.