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What's the difference between path tracing, ray tracing and photon mapping?
https://news.ycombinator.com/item?id=9994935#:~:text=With%20photon%20mapping%20you%20trace%20a%20ray%20from,the%20gathered%20energy%20back%20to%20the%20camera%20%28pixel%29.
What's the difference between path tracing, ray tracing …
https://news.ycombinator.com/item?id=9994935
Ray tracing is used in photon mapping and path tracing. With photon mapping you trace a ray from a light source and store the light energy for the area where the light hits an object. With path tracing you ray trace a ray from the camera and every time you hit an object you check if you can see a light source from that spot.
Ray Tracing and Photon Mapping - College of Computing
https://faculty.cc.gatech.edu/~phlosoft/photon/
For ray tracing, we shoot one ray per pixel into the scene (allowing a single reflection from the specular sphere). A single shadow-ray then determines whether or not a pixel is lit by a point light source. To compute the photon map, we emit 1000 photons (each of which bounces three times) from a hemispherical light source.
Sampling strategy | YafaRay
http://www.yafaray.org/node/760
In YafaRay, sampling settings are scattered around different panels but they are all connected to configure the raytracing tree. Primary rays that start from the camera (green) are configured with anti-aliasing samples. ... IBL backgrounds, path tracing, final gather and photon mapping. Besides, this is only a partial analogy of what really ...
Critical: Incorrect sampling / randomness! | YafaRay
http://yafaray.org/node/803
test_mat1c - Photon map - original MC plus 5 lights not affecting scene.png . Same problem happens with path tracing. With only one light we get this render: test_mat1c - Path tracing - original MC without extra lights.png . If we add 5 more spot lights pointing upwards, not illuminating the scene, we get this incorrect result:
Irradiance Caching in Photon Mapping Integrator, by
http://yafaray.org/node/369
The main idea is to implement IC inside Yafaray's two-pass photon mapping algorithm, specifically for improving the speed and quality of indirect illumination on diffuse (Lambertian) surfaces, which is the most costly component to compute in a Monte Carlo ray tracer (this is the case even if we only compute the first bounce of diffuse illumination, like in Final Gather).
View topic - Sasha Koruga - Progressive Photon Mapping …
http://yafaray.org/community/forum/viewtopic.php?t=3273
I'd also like enhancing the algorithm speed with GPGPU programming with a fallback to CPU code. I’ve always been very interested in computer graphics algorithms, and progressive photon mapping in particular sounds like it would be a lot of fun to implement. I've already made a ray tracer for my course, and the photon mapping lectures begin on ...
SPPM explained | YafaRay
http://yafaray.org/node/816
In 128 passes the result is a very clean image; I believe our path tracing algorithm would have a hard time reaching this level of noise in the same time. Also the result is so consistent that it is probably much more compatible with animation works than the standand photon mapping plus final gather. Quality wise, SPPM is a very interesting ...
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