What you want to ask is whether the painted wine bottle is darker than gypsum? Not deep.

Gypsum, the projection is heavier, while the bottles and crocks in still life are the opposite, which will be lighter.

The key is that the place near you is heavier and the ground that touches the object is heavier. Dark corners are also relatively heavy, and backlight has three elements: the dividing line between light and dark, dark parts and reflection.