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Ray tracing is a technique that can generate near photo-realistic computer images. A wide range of free software and commercial software is available for producing ...
The book is now in its fourth edition. [ 3 ] The first successful, yet partial implementation of physically-based rendering in a video game can be found in the 2013 title Remember Me , that despite being built on a game engine not natively supporting this technology ( Unreal Engine 3 ) was properly modified to accommodate this feature. [ 4 ]
It uses ray tracing to perform all lighting calculations, accelerated by the use of an octree data structure. It pioneered the concept of high-dynamic-range imaging , where light levels are (theoretically) open-ended values instead of a decimal proportion of a maximum (e.g. 0.0 to 1.0) or integer fraction of a maximum (0 to 255 / 255).
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New HLSL shaders, ray-generation, closest-hit, any hit, and miss, that are used describe computationally what DXR is doing when rendering raytracing. These shaders utilize the TraceRay function in HLSL to trace rays in the environment. When the ray interacts with the generated plane it can call on one of many selected hit or miss shaders.
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[32]: 25–27 [31] Ray tracing was often used for rendering reflections in animated films, until path tracing became standard for film rendering. Films such as Shrek 2 and Monsters University also used distribution ray tracing or path tracing to precompute indirect illumination for a scene or frame prior to rendering it using rasterization.