Sets the letter in the tile's top-left corner with the value staying bottom
right — the in-game tile layout — instead of centring it. The glyph is placed
by its ink box rather than the text origin, so every letter lands on the same
corner whatever its side bearings and ascent.
Adds day-spot: the same crop and camera as night-spot on a light ground, so the
chosen composition exists as a light/dark pair.
Ilia Denisov
