Using a shifted lens to achieve visual depth in facade projections more efficiently

This paper describes a method for creating spatial illusion projections in a simple yet efficient way. It uses the horizontal and vertical lens shift properties of a virtual camera in a 3D modelling software to produce a normalized image that can be subsequently mapped with a traditional mapping technique, as cornerpin keystone correction for instance, onto a real facade. Our calculations describe how to automatically derive horizontal and vertical shift values. The method was developed during the creation process of a series of projections created with the 3D modelling software “Blender”.