(Teaching is a principle oriented UE4 material teaching. The teaching will analyze the material from the perspective of mathematics, including various terms and popular explanations of real-time rendering technology, so as to help artists understand the principle and application of each node of the material from a deeper level. There are 14 chapters and nearly 100 sections, covering most common material nodes and main material parts, such as mathematical operation of material, various vectors of material, material examples, vertex color, vertex offset, pixel depth offset, etc. Motion, material function, material parameter set, light function material, post-processing material, etc.)