canvas

# game.stage.canvas The canvas of a big top that has been up too many seasons. Two inks in alternating gores, a sewn seam down every join, soot in the peak where the lamps have burned at it, damp and mildew climbing the hem, and the vertical rain-streaks canvas carries between them. The gores sag between their seams, done in the vertex hook so the sag is in the silhouette rather than painted on. Reads UV from `game.stage.tentGeometry.revolve`: u is the fraction round the tent, v climbs 0 at the apex to 1 at the hem. `stripes` is how many gores go round; `bounce` is a floor of self-illumination standing in for the sodium light coming back off six metres of sawdust, without which the ceiling of a tent lit only from the ring is black.