Transform this exact sofa into a hand-drawn graphite pencil product design sketch on a sheet of white drawing paper. Keep exactly the same sofa shape, proportions, cushions, headrests, armrests, thin black legs and the same 3/4 camera angle as in the reference. Clean confident pencil lines, faint construction and perspective lines, light cross-hatching for shadows under the sofa, no color. The paper lies on a warm wooden drafting table, a metal ruler and an eraser at the top edge, a hand holding a black pencil touching the paper near the sofa armrest. Soft warm daylight. Vertical 9:16 composition, the sofa sketch centered in the lower-middle part of the frame, same position and size as the sofa would be in the room photo.
