Final answer:
The oblique lighting technique is used to reveal surface texture and imperfections by casting shadows that make the surface texture more pronounced, thereby giving an illusion of depth.
Step-by-step explanation:
The oblique lighting technique is used to reveal the surface texture and imperfections of a subject. This technique involves lighting the subject at a shallow angle, which causes shadows to form in the crevices and textures of the surface, making the texture more pronounced and visible to the observer. The form of the subject can appear more 3D as the difference in lighting and shadow can give an illusion of depth.
For example, when light comes from the left of a subject, it creates shadows on the right, which can make a photo appear three-dimensional. This interplay between light and texture helps artists and photographers create a sense of realism. With excellent brushwork and layers of paint, artists can add texture to their work and provide an illusion of reality.