Disney's Practical Guide to Path Tracing
Why Hacker News recommends it
Recommended as an approachable intro to path tracing in ray tracing and rendering threads.
What it is
Walt Disney Animation Studios' short introduction to path tracing, showing how rays are traced and bounced through a virtual scene to simulate light. It explains how this approach is used in animated films.
Recommended by 3 HN commenters across 3 different months, 2017 to 2021.
What Hacker News said
Recommends legodt · 2017-02 · on “Breakdown of a Simple Ray Tracer”
This is a really cool demonstration, love the code breakdowns. For a less technical, but broader scale description of ray tracing, Disney made an excellent video describing their use of ray tracing in movies. Check it out here: [this video]
Recommends andystanton · 2018-11 · on “Accelerated “Ray Tracing in One Weekend” in CUDA”
As the topic is about Ray Tracing in One Weekend and the book admits it's "technically a path tracer" here's a great Disney video introducing path tracing: [this video]
Recommends lattalayta · 2021-01 · on “Pixar's Render Farm”
Here's a kind of silly but accurate view of path tracing for animated features [this video] Typically, most pathtracers use a technique called Monte Carlo Estimation, which means that they continuously loop over every pixel in an image, and average together the incoming light from randomly traced light paths. To calculate motion blur, they typically sample the scene at least twice (once at camera shutter open, and again at shutter close). Adaptive sampling rendering techniques will typically converge faster when there is less motion blur. One of the biggest time-saving techniques lately, is machine learning powered image denoising [1]. This allows the renderer to compute significantly fewer sampl