Render Ready 3D Models

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In this category you will find render ready 3D models.
Rendering or image synthesis is the automatic process of generating a photorealistic or non-photorealistic image from a 2D or 3D model (or models in what collectively could be called a scene file) by means of computer programs.
The model here is a representation of any objects or phenomena in a strictly defined language or in the form of a data structure. Such a description may contain geometric data, the position of the observer’s point of view, information about the illumination, the degree of the presence of some substance, the intensity of the physical field,
Often in computer graphics (artistic and technical) rendering (3D rendering) means – creating a flat image – digital bitmap image – on the developed 3D-scene. Synonym in this context is visualization.
Visualization is one of the most important sections in computer graphics, and in practice it is closely related to the others. Usually, 3D modeling and animation software packages are also includes a rendering function. There are separate software products that perform rendering.
Depending on the purpose, pre-rendering is distinguished as a rather slow visualization process, which is mainly used in video creation, and real-time rendering, for example, in video games.
A computer program that produces a rendering is called a render or renderer.
Nowadays many visualization algorithms have been developed. Existing software can use several algorithms to obtain the final image.
The tracing of each ray of light in a scene is impractical and takes an unacceptably long time. Even tracing a small number of rays, sufficient to get an image, takes an extremely long time, if sampling is applied.
Because of this, four groups of methods were developed, they are more effective than simulation of all the light rays in the scene:

  • Rasterization together with the scanning of lines – Scanline rendering.
  • Ray casting. In this case, the scene is pretended as being observed from a certain point. From the viewpoint, rays are directed to the objects of the scene, with the help of which the color of the pixel on the two-dimensional screen is determined. In this case, the rays stop their propagation (unlike the method of reverse tracing), when they reach any object of the scene or its background. It is possible to use some very simple ways of adding optical effects.
  • Ray tracing is similar to the throwing rays method. From the viewpoint, rays are directed to the objects of the scene, with the help of which the color of the pixel on the two-dimensional screen is determined. However, the beam isn’t stopped for spreading, instead it is divided into three ray-components, each of them contributes to the color of the pixel on the two-dimensional screen: reflected, shadowed and refracted. The amount of these components determines the depth of the trace and affects the quality and photorealism of the image. Due to its conceptual features, the method makes it possible to obtain very photorealistic images, however, because of the high resource consumption, the visualization process takes long time.
  • Path tracing uses a similar ray tracing principle, but this method is the most approximate to the physical laws of light propagation. Also is the most resource-intensive.