01 / original surface
The painting stays itself.
No invented fruit, no cartoon geometry. The page begins with the painting as the exact image plane: dark ground, blue bows, grapes, flowers, insects, and varnish.
02 / shallow relief
Only the depth moves.
Cropped layers from the same image separate by a few centimeters, enough for parallax without breaking the original composition.
03 / museum light
A render that behaves like varnish.
Light, film grain, surface crackle, and a barely visible generated render pass add a dimensional sheen while the painting remains the source of truth.
04 / next fidelity pass
Perfect similarity needs a model.
The next step is hand-masked layers or a real depth map. That would let every grape, ribbon, petal, and insect occupy its own precise plane.