Separate alignment from composition
Begin with the surface unanimated. Use a simple grid, outline and a few large areas of grey to understand what is visible from the audience position. Check edges, focus and any obstruction before deciding that a complex image is failing aesthetically. A technical alignment problem and a compositional problem can look surprisingly similar.
Derivative’s Kantan Mapper provides a TouchDesigner interface for outlining projection regions and assigning TOP images to them, with tools for fitting images to shapes. Its documentation places the component in the Mapping section of the palette. Use the current documented workflow for the installed version and begin with one region.
Mark the intended projector and surface positions in a way appropriate to the venue. Small physical movements can invalidate careful digital alignment. Save a reference image of the setup and a simple calibration scene. You should be able to check the geometry without loading the most demanding performance patch.
Test a still image before animation whenever the physical setup changes. It gives you a dependable reference for the new arrangement.
Let the material influence the image
A textured wall, a fabric surface and a smooth panel do not present the same image. Observe what the material does to fine detail, dark areas and colour. Rather than immediately compensating for every irregularity, decide which qualities belong to the work. Some surfaces can give a simple moving field a useful physical character.
Compose from the audience’s likely viewpoint. An image that looks balanced directly beside the projector may feel distorted or visually crowded from the room. Walk to several plausible positions while the calibration scene is displayed. Decide whether the work has a preferred viewing zone or should remain legible across a wider area.
Place an important visual event away from the least reliable edge. Reserve fine detail for areas where it can actually be seen. Large changes in shape or distribution often communicate better at a distance than a dense pattern that was impressive on the laptop. Make the choice through observation of the actual surface.
Keep mapping corrections separate from creative animation wherever practical. A surface-fit adjustment should not require rewriting the musical behaviour of the scene. Clear separation also makes it easier to move the work to another venue: the composition can remain recognisable while the geometry is recalibrated.
Rehearse the room as part of the instrument
Run the intended sound and image together at representative levels and lighting. Listen from the audience area while someone performs the visual changes. Does the projection support the scale of the music, or make a restrained passage feel unintentionally spectacular? A room can magnify a modest screen gesture.
Check transitions that involve dark material. Projected black is affected by the projector and surrounding light, so it may not behave like an absent object. Design a convincing low-intensity state using the conditions you actually have. Avoid relying on a perfectly invisible rectangle unless the setup demonstrates it.
Make a fallback scene that fits the mapped surface and can remain still without looking accidental. Rehearse returning to it while preserving the audio performance. Save the mapping, source assets and output settings together, and reopen the project before packing away.
Finally, write a short setup note for a future version of yourself: surface dimensions, projector position, output resolution, preferred audience position and the calibration file. Add observations rather than marketing specifications alone. Projection becomes repeatable when the physical arrangement and the artistic decisions are documented as parts of the same work.
Try this.
Map one surface using a static calibration scene. View it from three audience positions, then create a simple moving composition that uses the material’s strengths and includes a convincing quiet state.
Listen back
- Is the problem alignment or composition?
- Which details survive at audience distance?
- What changes when the room’s light changes?