Overlay colours people will actually keep
We use four overlays in the Lampoon studio: water, electricity, access, and voice or radio. Everything else is written as a note on those sheets. A fifth colour appears only when a host insists on steam or medical gas, and then we add a legend the size of a postcard, taped to the map rail.
Participants choose the colour names in Thai and English on day one. If the group says “blue is well water, not city water,” we write that sentence on the legend. Later readers will argue less.
Photograph the wall at lunch and again at close. Paper curls. Tape fails. The photograph is the copy you email to people who could not attend Friday.
Do not digitise on day two. Digitising too early freezes wrong arrows. Finish the paper argument first.