- Scene: large black chalkboard framed in wood with two recessed ceiling lights above.
- Chalkboard drawings/marks:
  - Left: large white chalk cartoon of a stylized woman (full figure).
  - Right (profile): chalk sketch of a man's head facing left with label "H(s,c)" to its right.
  - Horizontal dividing line across lower-middle with text above: "payment layer" and below: "transaction layer".
  - Small boxed note to right of center with word "fraction" (possible "10:1" beneath).
  - Misc. faint scribbles and equations near center; a lone "=" and a circled "M" are visible.
- Legible text fragments (approximate locations): "payment layer" (center above line), "transaction layer" (center below line), "H(s,c)" (right), "fraction" (right boxed).
- Objects on the shelf in front of board:
  - Left: dark sculpted bust.
  - Center-left: small multi-limbed statuette holding a cup/candle.
  - Center: rectangular plaster/relief panel.
  - Right: small metal box (lighter?) and stacked books.