How to color a model in MAYA

It is an auxiliary pen used to highlight images. Draw on the screen with ink or light color, and bake the image to enhance the artistic effect. Shading: that is, painting ink or color on the rubbing place. Dyeing: use a large area of wet pen to color or ink the periphery of the image to contrast the image of the picture. Yang Shen's "Lin Yi's Hair Comb at the Fall of the Mountain" in the Ming Dynasty: "The painter uses ink to make up beautiful hair, which is called rendering." Qing Gong Zizhen's "Title Orchid" No.4: "Xuanzhou paper workers render thin, where does the painter get gold?" Ma Nancun's "Yanshan Nighttalk: The Same Origin of Painting and Calligraphy": "Some strokes and renderings use dry pens and wet pens slightly, but as far as the whole picture is concerned, the ink used is mostly semi-dry and semi-wet, showing a particularly harmonious tone." 2. Refers to the contrast between objects and images. In the Qing Dynasty, "Dujiangyun Xu Gaoming visited Yun Chuan Pavilion and sat in the rain" said: "Autumn fragrance is full of autumn." Mao Dun's Shake III: "The bright colors of Chimonanthus praecox and Bambusa australis are rich and warm all over the courtyard." 3. A form of literary and artistic creation. Give outstanding description, explanation and support to the written object. Qin Mu's "Picking up Shells from the Ocean of Art, the Power of Art and the Interest of Writing": "Ancient poets described the heavy snow, saying that it was' 3 million jade dragons after the war, and broken bones were flying all over the sky'. Describe the gorgeous begonia with stalks, saying that it is' 84,000 heavenly daughters wash their faces and pour rouge here'. This suddenly makes ordinary things magnificent. " 4. refers to the extravagance and exaggeration of things. Ba Jin's Spring 21st: "Wang makes the story vivid." In narrative, the environment and characters in the article are deliberately described and compared by means of rendering, so as to strengthen anger and deepen the theme. There are two commonly used rendering methods (1): it repeatedly uses the same or similar sentences to express emotions, render emotions and highlight themes, such as the article "Premier Zhou, where are you?" (2) Contrast: Describe the environment or specific atmosphere, and express some emotions of the characters. This is the description of the winter scenery in his hometown at the beginning of Lu Xun's novel "Hometown". Such an environment and atmosphere have played a powerful role in rendering the sad psychology of the characters and the theme of the works. The rendering in the computer is 1. Rendering is the last process of CG (except post-production, of course), and it is also the stage to finally make your image conform to your 3d scene. There are many kinds of rendering software, such as: each CG software has its own rendering engine, as well as RenderMan and so on. Rendering is called rendering in English, and some are called coloring, but I'm more used to shadow coloring and rendering. Because the words "rendering" and "shading" are completely different concepts in 3D software, although their functions are similar, they are different. Shade is a display scheme, which generally appears in the main window of 3D software. Like the wireframe of 3D model, it plays an auxiliary role in observing the model. Obviously, the coloring mode makes it easier for us to understand the structure of the model than the wireframe mode, but this is just a simple display, which is called shading in digital images. In advanced 3D software like Maya, you can also use Shade to display simple lighting effects, shadow effect and surface texture effect. Of course, high-quality coloring effects need the support of professional 3D graphics cards, which can accelerate and optimize the display of 3D graphics. However, no matter how optimized, the displayed three-dimensional graphics can not be turned into high-quality images. At this time, because Shade adopts a real-time display technology, due to the speed limitation of hardware, it is impossible to feedback the ray tracing effects such as reflection and refraction in the scene in real time. In practical work, we often output models or scenes as image files, video signals or movie films, which have to go through rendering programs. Shade window provides a very intuitive and real-time basic surface coloring effect. According to the ability of hardware, it can also display texture map, light source influence and even shadow effect, but all these are rough, especially without the support of hardware, its display will even be unreasonable and disorderly. The rendering effect is different. It is calculated according to a complete set of programs. The influence of hardware on it is only a matter of speed, and will not change the rendering result. What affects the result is to see what program it is based on, such as ray tracing or ray transmission. The basic process of rendering is to first locate the camera in the three-dimensional scene, just like real photography. Generally speaking, 3D software has provided four default cameras, that is, four main windows in the software, which are divided into top view, front view, side view and perspective view. Most of the time, we render perspective views, not other views. The perspective camera basically follows the principle of real camera, so the result we see will be as three-dimensional as the real three-dimensional world. Next, in order to reflect the sense of space, the renderer should do some "special" work, that is, decide which objects are in front, which objects are behind and which objects are blocked. The sense of space cannot be perfectly reproduced only by the occlusion of objects. Many beginners only pay attention to the shaping of three-dimensional sense, but ignore the sense of space. You should know that the sense of space has a lot to do with the attenuation of light source, the fog in the environment and the effect of depth of field. After the rendering program obtains the range to be rendered through the camera, it needs to calculate the influence of the light source on the object, which is the same as the real world. Many 3D softwares have default light sources, otherwise we can't see the coloring effect in perspective, let alone rendering. So the rendering program is to calculate the influence of each light source we add to the scene on the object. Different from the light sources in the real world, rendering programs often have to calculate a large number of auxiliary light sources. In the scene, some light sources will illuminate all objects, while some light sources only illuminate one object, which makes the original simple things complicated again. After that, do you use depth mapping shadow or ray tracing shadow? This usually depends on whether transparent objects are used in the scene to calculate the shadow cast by the light source. In addition, after using the surface light source, the rendering program has to calculate a special kind of shadow-soft shadow (only ray tracing can be used). If the light source in the scene uses light source special effects, the rendering program will also spend more system resources to calculate the results of special effects, especially the volume light, which is also commonly known as light fog, will take up several generations of system resources, so it must be paid attention to when using it. After that, the rendering program will also calculate the color of the surface of the object according to the material of the object. Different types of materials, different attributes and different textures will produce various effects. And this result does not exist independently, it must be combined with the light source mentioned above.