Oranienbaum. The Monkey Cabinet in Roller Coaster hall

Lightly sketch the basic perspective lines and shapes of the room, including the walls, doorway, and furniture.

Establish the horizon line and vanishing points to ensure accurate perspective.

Apply a light wash of diluted yellow ochre to the areas illuminated by light from the doorway.

Mix a pale green and apply it to the wall panels, varying the tone slightly to create depth.

Add a light purple wash to the wall sections between the panels.

Paint the furniture with a light gray wash, suggesting the white fabric with subtle shadows.

Use a fine brush to add the gold ornamental details on the walls and doorway.

Refine the shadows and details, adding darker tones to create contrast and definition.