Essentially procedural texturing is about defining rules. At first they are conscious rules, but as you do it more and more they become second nature. Then, you find yourself approaching other parts of your job with the same thought process — all these little details that could be defined by rules. Like how to tile things, how to repeat them. How to offset things, how to place them on the wall, and all these little decisions that people don’t think about. I think that’s one of the big things that people miss out on, especially with CG. People look at an environment.
The freedom and challenge of procedural texturing is one of the most enjoyable and daunting parts of the material creation process. While using baked maps or photographic textures is essentially about describing what something looks like, procedural methods require an understanding of how things work. You have to analyze how metal grain is made by noise, stone imperfections by fractals, and erosion by stacking of the two. It is a much more meaningful way of connecting nodes and is almost like doing visual math.
The magic happens when procedural tools are not a language you have to speak, but an innate part of your thought process. When an artist is long past thinking about noise or curvature map and instead about surface logic. I want to have more micro roughness here, because this part is not handled as much. I want to have more defined wear here because it will be more exposed to weather. I want to have more colour variation here because it is rich in iron. When all of these choices come organically from the materials knowledge and not from the tool knowledge, the procedural graph fades into the background. You are simply thinking about physics and art.
Many people think that using procedural texturing always results in uniform, bland outcomes. Nothing is further from the truth. When done right, procedural systems can produce a degree of randomness. This means you can create endless variations of the same texture, which is something you can’t achieve with regular photo textures. Using a procedural wood texture, you can make hundreds of different wooden planks, all with a slightly different placement of knots and fibers. The look and feel of the planks stays the same across the entire level. This is why procedural textures are so useful for big projects where repetition needs to look natural, not repetitive.
Procedural tools also have a learning curve. If you’re new to them you’ll probably end up with a cluttered messy image because you don’t yet know when to hold back. A lot of experienced artists’ work is about simplifying things, stripping away nodes to leave just enough texture to get the idea across without making the viewer’s eyes water. Some pros even maintain little ‘procedural sketches’: small groups of nodes for doing something like edge-wear or microroughness or colour bleed that they’ve worked on for years and reuse across jobs. These ‘sketches’ improve as the artist improves and often become a key part of their style.
Lastly, in a broader sense, procedural texturing is a fusion of art and science that is very hard to find elsewhere. It shows that the aesthetic of many materials lies in the balance between structure and randomness, between precision and organic irregularity. An artist who is able to develop a procedural model that still looks as if it was modelled by hand, which reacts as expected to changes in lighting conditions, and which does not break its believability when zoomed in or zoomed out, has truly mastered his trade. In an industry which is becoming increasingly dependent on automation, artist-driven proceduralism is one of the last strongholds of digital creation.
