u/I_am_curious_in r/GraphicsProgramming • Recommends
Disney explaining Path Tracing in the most Disney way.
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#pathtracing#raytracing#disney
Disney's Practical Guide to Path Tracing
Walt Disney Animation Studios
6.3M subscribers • 1 video on Hallway
- Recommended by 5 people: 3 on Hacker News, 1 on Lobsters and 1 in engineering communities.
- A classic. People kept recommending it from 2017 to 2021.
- Made by the vendor. The company whose product it covers made or sponsored it.
Beginner. No background in the topic needed.
914K views10 years ago5 recommendations
An introductory explanation of path tracing, showing how simulating light rays bouncing through a virtual scene creates realistic animated images.
Path tracing is a method for generating digital images by simulating how light would interact with objects in a virtual world. The path of light is traced by shooting rays (line segments) into the scene and tracking them as they bounce between objects. Path tracing gets its name from calculating the full path of light from a light source to the camera. Light can potentially bounce between many objects inside the virtual scene. As a ray of light hits a surface, it bounces and creates new rays of light. A path can therefore consist of a number of rays. By collecting all of the rays along a path together, the contributions of a light source and the surfaces along the path can be calculated. These calculations are used to produce a final image.Why it's here
5 people recommend thisWhat people say. Highly recommended as an exceptionally clear, visual, and accessible introduction to path tracing and ray tracing.
legodton Hacker News • Recommends
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: link to this video
andystantonon Hacker News • Recommends
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: link to this video
lattalaytaon Hacker News • Recommends
On “Pixar's Render Farm”
Here's a kind of silly but accurate view of path tracing for animated features link to 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…