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Soft Shadows - Computer Science
https://www.cs.unc.edu/~dm/UNC/COMP236/LECTURES/SoftShadows.pdf
• Also, use a hires stencil buffer (we use 16 bits) – called light intensity buffer here How to rasterize a wedge… • Init light intensity (LI) buffer to 255 before • 255 = full light, 0 = no light, 0 < x < 255 penumbra wedge Front plane back plane Examples of rasterization in 2D • Next, describe missing pieces:
Distributed Ray Tracing - WPI
https://web.cs.wpi.edu/~matt/courses/cs563/talks/dist_ray/dist.html
Distributed ray tracing achieves this type of translucent surface by casting randomly distributed rays in the general direction of the transmitted ray from traditional ray tracing. The value computed from each of these rays is then averaged to form the true translucent component. Soft Shadows Shadows in traditional ray tracing are discrete.
(PDF) Soft Shadows for GPU Based Ray-tracing
https://www.researchgate.net/publication/258121428_Soft_Shadows_for_GPU_Based_Ray-tracing
Results of the tests are presented at the end of the paper. The software was implemented using the NVidia OptiX ray tracing engine, which allows rendering reasonable quality scenes at …
Distributed ray tracing - Wikipedia
https://en.wikipedia.org/wiki/Distributed_ray_tracing
Soft Shadow Volumes for Ray Tracing - ETH Z
https://cgl.ethz.ch/teaching/former/seminar/handouts/Lang_SoftShadowVolumes.pdf
Methods for Soft Shadows • Stochastic Ray Tracing – Use many shadow ray to sample light source • Radiosity Algorithm – Visibility of light source defined on a patch level • Tracing thick rays – Use pyramid beam, intersecting with shadow casters • Soft Shadow volumes – Projection of shadow caster to light source – Our method pixel 7
c++ - Implementing soft shadows in a ray tracer - Stack …
https://stackoverflow.com/questions/31658226/implementing-soft-shadows-in-a-ray-tracer
what I am trying to do is implementing soft shadows in my simple ray tracer, developed in C++. The idea behind this, if I understood correctly, is to shoot multiple rays towards the light, instead of a single ray towards the center of the light, and average the results. The rays are therefore shot in different positions of the light.
Ray tracing - soft shadow - Game Development Stack Exchange
https://gamedev.stackexchange.com/questions/104824/ray-tracing-soft-shadow
You can then test these rays for intersection against other objects in your scene, as you would for sharp shadows. Then you can simply add up the number that hit something and divide it by the number of test rays. That fraction will range from 0 (no shadow) to 1 (fully occluded), and you can light your point based on that value.
Soft Shadow Volumes for Ray Tracing - Chalmers
http://www.cse.chalmers.se/~uffe/SoftShadowVolumesForRayTracing.pdf
Parker et al. [1998] render soft shadows at interactive rates in a parallel ray tracer by using only a single sample per pixel and “soft-edged” objects. Their algorithm is very fast, but not physically-based. Bala et al. [2003] use an edge-and-point image …
Distributed Ray Tracing (Soft Shadow)
https://ray-tracing-conept.blogspot.com/2015/01/distributed-ray-tracing-soft-shadow.html
Distributed Ray Tracing (Soft Shadow) DISTRIBUTED RAY TRACING : Conventional ray tracing uses single ray to trace all the objects in the scene. In distributed ray tracing we will use multiple ray to render a scene. This concept will help us to produce more realistic images. This ray tracing method is also known as Stochastic ray tracing
3d - Ray tracing - soft shadow - Stack Overflow
https://stackoverflow.com/questions/31709332/ray-tracing-soft-shadow
Generate a set of M random, uniform shadow rays from P towards disc D. If a ray R intersects anything before hitting L, there is no energy transfer along this path. Otherwise: multiply E/M by a dot product of normal vector N at P and (normalized) R, add the result to the light transferred so far. Repeat for all M rays.
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