(Teaching-oriented UE4 material teaching. The teaching will analyze materials from a mathematical point of view, including various terms and popular explanations of real-time rendering technology, to help artists understand the principles of materials and the application of each node in a deeper level. The book has fourteen chapters and nearly a hundred sections, covering most commonly used material nodes and main material parts, such as mathematical operations of materials, various vectors of materials, material instances, vertex colors, vertex offsets, pixel depth offsets, etc. . Shift, material function, material parameter set, light function material, post-processing material, etc.)