to add natural light and shadow to the image you can use a light source such as a window or a light bulb to illuminate the green plastic object on the white surface the light will create shadows and highlights on the object giving it a more realistic and visually appealing appearance you can also adjust the angle and intensity of the light source to create different effects such as soft diffused light or harsh direct light this will allow you to control the overall mood and atmosphere of the image making it more engaging and interesting for the viewer architecture
