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Path tracing - Wikipedia
https://en.wikipedia.org/wiki/Path_tracing
What are caustics and how to render them the right way
https://www.chaos.com/blog/what-are-caustics-and-how-to-render-them-the-right-way
With simple reverse path tracing, when using a small light source, the rays traced from the camera can miss the source completely — which causes this “firefly” effect. Solution 1: Use light sampling to find small light sources But there is a solution that helps the renderer to make sure they don’t miss the light source — even the very small ones.
pathtracing - Caustics: methods to render? - Stack …
https://computergraphics.stackexchange.com/questions/5014/caustics-methods-to-render
While (naive) Path Tracing can render caustics, it takes a long time to clean the rendered image due to how the algorithm works. Photon Mapping makes the converging speed faster by doing some tricks on how light paths are interpolated. Bi-Directional Path Tracing on the other hand tries to make some difficult-to-sample light paths easier.
Basics about path tracing · A Graphics Guy's Note
https://agraphicsguynotes.com/posts/basics_about_path_tracing/
Path tracing is a type of ray tracing algorithm which solves the rendering equation very well. And it is unbiased and consistent which means that as the number of samples increases per-pixel, the result is heading for the physically correct value. It is simple and easy to implement once you have mastered the math behind it.
Basics about path tracing – A Graphics guy's note
https://agraphicsguy.wordpress.com/2015/07/20/basics-about-path-tracing/
Path Tracing: Direct Lighting + Indirect Lighting for Caustics
https://www.gamedev.net/forums/topic/628560-path-tracing-direct-lighting-indirect-lighting-for-caustics/
I have written a path tracer in OpenCL. It works great, but it's slow to converge, particularly for small lights. From some research, I understand that this can be rectified by explicit light sampling ("Direct lighting method") by sampling …
Path Tracing vs Ray Tracing - Dusterwald.com
https://www.dusterwald.com/2016/07/path-tracing-vs-ray-tracing/
When it hits a surface it doesn’t trace a path to every light source, instead it bounces the ray off the surface and keeps bouncing it until it hits a light source or exhausts some bounce limit. It then calculates the amount of light transferred all the way to the pixel, including any colour information gathered from surfaces along the way.
Global Illumination and Path Tracing - Scratchapixel
https://www.scratchapixel.com/lessons/3d-basic-rendering/global-illumination-path-tracing
We prefer backward tracing which consists of tracing the path of light rays from the eye, back to the light source where they originated from. The problem is that backward tracing is an efficient way of computing direct illumination indeed but not always an efficient way of simulating indirect lighting. We will show why in this lesson.
Bidirectional Path Tracing - SITVS ZLECDII
https://hummawhite.github.io/2022/03/12/bidirectional-path-tracing.html
Bidirectional Path Tracing Posted by Zlekdiuson March 12, 2022 · 1 min read Beautiful caustics. Unweighted contribution, MIS weight (power heuristic), and weighted contribution The visualized MIS weights supported my earlier hypothesis that direct caustics in BDPT is mostly contributed by light tracing (t=1 case).
How to render caustics with the new caustics solver in 3ds Max?
https://support.chaos.com/hc/en-us/articles/4954589213457-How-to-render-caustics-with-the-new-caustics-solver-in-3ds-Max-
Caustics work with both the UHD Cache and Path Tracing Caustics from each light source will also be correctly adjusted by LightMix Caustics can be disable for specific lights sources and environment light (HDRI or Corona Sky) Objects can be excluded from receiving caustics There are, however, also currently some limitations:
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