Understanding of Rendering Principle (Rendering technology of 3D image)
Commercial films (CF) and movies can be seen in the CG have a fairly realistic texture expression.This is a mathematical model in which the surface characteristics, texture, and lighting of an object are calculated as ideal conditions. This gives a realistic texture representation. Rendering is the process of creating an image by computer-based calculation. Types of rendering techniques CG technique can be divided into a modeling technique and rendering technique. As the modeling technique is called "a method of detailing an object or space", the rendering technique can be called "a method of creating an image based on data". In addition, the data created by modeling is a virtual environment in the computer itself, and rendering can be said to be a method of visualizing a virtual environment in the form of an image. In CG, a rendering technique that determines the completion of an image can be classified according to which image is to be created. Whether to draw using lines, to draw using surfaces, or to draw space itself as objects with a distribution of density or concentration, such as clouds or snow. There are problems such as how to express three-dimensionally of perspective and opacity when drawing with line only, how to treat reflection or transparency of light when drawing the inside or inside of an object, Theories and techniques are being studied.
Diffused light is a component of light diffused and reflected on the surface of an object. Diffuse reflections follow Lambert's law and are determined by the angle of the light source and the surface, regardless of the direction of the viewpoint. The diffuse reflectance is given a high value in the case of rough unevenness like the face of a stone pagoda, and a small value in a slick face like a metal. The shadow color is affected by the color of the object and the color of the light source.
