3D hand-painted oil painting is an art form that combines traditional oil painting techniques with three-dimensional (3D) effects. This artistic style is usually characterized by three-dimensional and realistic effects, and through clever shadows, perspective and hierarchy, the picture looks more deep and three-dimensional. Use the shadow and highlight effect to emphasize the three-dimensional sense in the picture. The effect of 3D painting is enhanced by adjusting the thickness of the pigment or using techniques such as bump stickers to enlarge the texture. Use different brushes and techniques to express various details. When creating 3D hand-painted wall arts, artists can try different techniques and materials to discover more creative and unique effects.