WINDOW VIEWS for the Curtains view (src/assets/lc2/curtains/<key>_day.webp)
Sizes: landscape 1200x896 (4:3), portrait 896x1200 (3:4), wide 1264x848 (3:2). One sheet per shape.
Reference image: a collage of photos taken through each window (tools/lc_art.py collage ... --size 1200x896).

Redraw this reference sheet as a sheet of {N} clear-line comic-album panels in a {COLS} by {ROWS} grid, same
order and compositions, straight even white gutters, thin black ink border around each panel. Each panel is the
view out through the same window: the window frame, mullions and sill and a little of the room around it, with
the outside scene clearly visible in daylight: (1) {VIEW 1}; (2) {VIEW 2}; ...
{STYLE BLOCK}
Then: slice + fit to the size above, and
      tools/lc_art.py grade <key>_day.webp <key>_night.webp --mode night
      tools/lc_art.py grade <key>_day.webp <key>_grey.webp --mode grey      (overcast / rain / fog / snow)
