message: [sextants] deeper sextants from beyond the dawn of time
diff: @@ -968,10 +968,17 @@ constexpr inline void blockSextant(Container& image, ImageSize size, T position)
  {
  auto const x0 = (position - 1) % 2;
  auto const y0 = [position]() {
  - switch (position) {
  + switch (position / 32) {
  + case 0: switch (position % 6) {
  + case 1: case 2: return 0;
  + case 3: case 4: return 1;
  + case 5: case 0: return 2;
  + }
  + case 1: switch (position % 6) {
  case 1: case 2: return 2;
  case 3: case 4: return 1;
  - case 5: case 6: return 0;
  + case 5: case 0: return 0;
  + }
  }
  return 0;
  }();
  