Rendering with MicroStation
Through illustrations and hands-on exercises, this book covers every aspect of rendering in detail, including cameras, materials, lighting, environment maps, and rendering settings.
TABLE OF CONTENTS Rendering with MicroStation
Photorealistic Ray Tracing
Where phong rendered images still are not realistic enough for your needs, you will need to use a more sophisticated rendering method, such as Ray Trace. Along with Radiosity and Particle Tracing, this type of rendering is extremely computation intensive. Typically, rendering times are at a magnitude greater than that associated with Phong rendering. The payoff, however, is extremely realistic images which, when set up properly, can result in images indistinguishable from a real-world photograph. This is possible, in part, because ray tracing, radiosity solving, and particle tracing all take into account all lighting sources including the reflection and the refraction of light. In addition, radiosity and particle tracing also can calculate diffuse reflections. Furthermore, particle tracing is able to produce caustics such as reflected light, and refraction.
Ray Tracing
Ray tracing is a photorealistic rendering technique in which an image is generated by simulating the specular reflection of light rays around a 3D model or scene. In theory, these rays are generated from the various light sources found in the 3D model which then bounce off objects in the model until they either exit into space or else intersect with the eye point of the view. When they intersect with the view eye point, they appear in the final image.
It was found, however, that because most of these light rays bounce off into space, never to be seen, it is more efficient, computationally, to trace the light path in reverse that is, to trace the light...
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