Ray tracing is one of the most elegant techniques in computer graphics. Many phenomena that are difficult or impossible with other techniques are simple with ray tracing, including shadows, reflections, and refracted light. Ray directions, however, have been determined precisely, and this has

performance. The first technique employs a pyramid of binary volumes to encode spatial coherence present in the data, and the second technique uses an opacity threshold to adaptively terminate ray tracing. Although the actual time saved depends on the data, speedups of an order of magnitude have been observed

For almost two decades researchers have argued that ray tracing will eventually become faster than the rasterization technique that completely dominates todays graphics hardware. However, this has not happened yet. Ray tracing is still exclusively being used for off-line rendering of photorealistic

High-quality images (shadows, refraction/reflection, etc. are straightforward) Photorealism without hacks Interactive now, and still improving Easier to use than OpenGL (for some applications) On the rise It pays to see how NPR fits in ray tracing. Ray Tracing NPR-Style Feature Lines

This paper presents new algorithms to trace objects represented by densities within a volume grid, e.g. clouds, fog, flames, dust, particle systems. We develop the light scattering equations, discuss previous methods of solu-tion, and present a new approximate solution to the full three

University of Utah, We examine a rendering system that interactively ray traces an image on a conventional multiprocessor. The implementation is “brute force ” in that it explicitly traces rays through every screen pixel, yet pays careful attention to system resources for acceleration. The design

Introduction Ray tracing has become a very popular method for image synthesis due to its unparalleled flexibility and its ability the generate images of high quality and realism. Simulation of effects such as reflection and refraction have been the hallmarks of ray tracing since its introduction

A new approach to ray tracing is introduced. The definition of a "ray" is extended into a cone by including information on the spread angle and the virtual origin. The advan-tages of this approach, which tries to model light propagation with more fidelity, include a better method of anti

modelling of the diffraction by half-planes and slits based on the energy flow lines concept

transfer problem in dusty galaxies: