The step from concept to form in a conventional architectural design processes could be regarded as phase of refinement and decision making – the appropriate materials, colours, structures, etc. In the case of the often complex forms that can be the outcome of computational design processes however, rules for and association of geometrical forms need to be rigorously defined and developed, continuously informing the design concept itself, and carrying the developmentinto the final stages of fabrication and assembly. This white paper presents the design processes for an interior cladding system functioning as an envelope for a conference room in a public hotel foyer, as part of a larger commission for the extension of an existing hotel. Early concept development was already considering final fabrication strategies, as well as a formal principle that would provide a variation of experiential effects from different viewpoints any time of the day.The formal design and computational design development was conducted as a project within the project, but also had to be related to the conditions and changes ofthe overall project process. At the final stages, the developed computational design systems were adapted to very specific production requirements from the producer ofthe elements to be assembled. The paper presents these very specific conditions in particular, and how the model was adapted to changing conditions at the constructionsite.