Mapped video projections can be a fun way to augment public space. In this talk I will show some projects I have worked on, and describe how they were produced. Workflows will be discussed, and tips on how to achieve certain effects will be revealed.
My latest project will serve as a case study: Video mapping was used to create the illusion of invisible dancers casting shadows. Motion capture and cloth simulation was used to animate the dancers. Spotlights with buffered shadow maps made them visible on the mapped surfaces. Light setup was done on sight, allowing to check if the illusion of light was good. Falloff curves of the virtual lights were tricky because the falloff of the real light from the projector has to be taken into account.