Projection mapping aligns imagery to geometry: corners of the content pinned to corners of the building, masks tracing the sculpture, so light lands exactly on the intended surfaces and the object itself seems animated.
How it works, step by step
Every mapped show is the same four moves. First, measure: photograph or scan the surface, or trace its outline live from the projector’s own point of view. Second, warp: distort the content so that from the projector’s position it lands aligned, corner to corner (keystone correction is the simplest case). Third, mask: cut away everything that would spill onto windows, sky, or audience. Fourth, author content for the surface: light that respects the architecture’s edges, so the building appears to crack, breathe, or dissolve rather than merely wearing a video.
The warping and masking happen in software: Resolume Arena, MadMapper, HeavyM, or a full media server on large shows. Multi-projector rigs add edge blending to hide the seams and careful throw distance planning so every surface gets enough light.
What it costs to try
A first experiment needs one projector, one interesting surface, and free or cheap software. Brightness is the real budget line: mapping a bedroom wall takes any projector, mapping a building takes tens of thousands of lumens, and rental quotes scale with the architecture.
Mapping and music
For music shows, mapping turned the venue into the canvas: DJ booths, stage sets, and cathedral facades all carry content now. It rewards content authored for the surface, which is why mapped shows are usually designed rather than improvised. Reactive content is the frontier where mapping meets the tools on our software map: a generative visual driven by the audio, warped onto the stage set, keeps the designed look without a fixed timeline.