Global illumination algorithms | Monte Carlo methods
Metropolis light transport (MLT) is a global illumination application of a variant of the Monte Carlo method called the Metropolis–Hastings algorithm to the rendering equation for generating images from detailed physical descriptions of three-dimensional scenes. The procedure constructs paths from the eye to a light source using bidirectional path tracing, then constructs slight modifications to the path. Some careful statistical calculation (the Metropolis algorithm) is used to compute the appropriate distribution of brightness over the image. This procedure has the advantage, relative to bidirectional path tracing, that once a path has been found from light to eye, the algorithm can then explore nearby paths; thus difficult-to-find light paths can be explored more thoroughly with the same number of simulated photons. In short, the algorithm generates a path and stores the path's 'nodes' in a list. It can then modify the path by adding extra nodes and creating a new light path. While creating this new path, the algorithm decides how many new 'nodes' to add and whether or not these new nodes will actually create a new path. Metropolis light transport is an unbiased method that, in some cases (but not always), converges to a solution of the rendering equation faster than other unbiased algorithms such as path tracing or bidirectional path tracing. Energy Redistribution Path Tracing (ERPT) uses Metropolis sampling-like mutation strategies instead of an intermediate probability distribution step. (Wikipedia).
Metropolis Light Transport | Two Minute Papers #16
Metropolis light transport is an advanced photorealistic rendering technique that is remarkably effective at finding the brighter regions of a scene and building many light paths that target these regions. The resulting algorithm is more efficient than traditional random path building algo
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Automatic Parameter Control for Metropolis Light Transport | Two Minute Papers #30
Photorealistic rendering (also called global illumination) enables us to see how digital objects would look like in real life. It is an amazingly powerful tool in the hands of a professional artist, who can create breathtaking images or animations with. Metropolis light transport is an adv
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Morning Tram Ride Timelapse - Hong Kong
Hong Kong Tramways (Chinese: 香港電車) is a tram system in Hong Kong, being one of the earliest forms of public transport in the metropolis. Owned and operated by Veolia Transport, the tramway runs on Hong Kong Island between Shau Kei Wan and Kennedy Town, with a branch circulating Happy Valle
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TU Wien Rendering #33 - Metropolis Light Transport
Metropolis Light Transport is a powerful technique that can outperform the convergence speed of Bidirectional Path Tracing on most difficult scenes (what makes a scene difficult is a story on its own). It promises optimal importance sampling "along multiple steps" in the stationary distrib
From playlist TU Wien Rendering / Ray Tracing Course
Hong Kong Tramway Ride - Downtown Hong Kong
Riding the Hong Kong Tramway from 55East Shelter Street (Eastbound Stop) to 95East Hoi Foo St (Eastbound Stop). When: Wednesday morning. Cost: $0.30 USD. Location: https://goo.gl/maps/rFr1T Hong Kong Tramways (Chinese: 香港電車) is a tram system in Hong Kong, being one of the earliest forms
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Riding the California St Cable Car - San Francisco Cable Car System - San Francisco California
"The San Francisco cable car system is the world's last manually operated cable car system. An icon of San Francisco, California, the cable car system forms part of the intermodal urban transport network operated by the San Francisco Municipal Railway. Of the twenty-three lines established
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Riding the California St Cable Car - San Francisco Cable Car System - San Francisco California
"The San Francisco cable car system is the world's last manually operated cable car system. An icon of San Francisco, California, the cable car system forms part of the intermodal urban transport network operated by the San Francisco Municipal Railway. Of the twenty-three lines established
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Toronto to Montreal by train with VIA Rail Canada
A journey from Toronto Union Station to Montreal Gare Centrale in Business Class on board VIA Rail Canada train 62. Toronto to Montreal takes just 4h58 by train, for information see https://www.seat61.com/Canada.htm
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TU Wien Rendering #37 - Manifold Exploration
That pesky torus enclosed in the glass cube again! Since it contains lots of SDS light paths, it is the bane of many rendering algorithms. However, it is no match for Wenzel Jakob's Manifold Exploration technique that explicitly looks for these paths and runs an equation solving system to
From playlist TU Wien Rendering / Ray Tracing Course
TU Wien Rendering #34 - SDS Transport, Photon Mapping
We have learned quite a few powerful algorithms for global illumination, but there still seems to be a peculiar scene with a torus inside a block of glass that just doesn't want to give in and render. It contains specular-diffuse-specular interactions that are particularly difficult, or of
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Train Ride - Chicago’s Downtown Loop – USA
Riding the Chicago L Train Brown Line 6x – Chicago’s North End (Fullerton) to the Downtown Loop – Chicago Illinois The Chicago 'L ' (sometimes written as "L" or "el", short for "elevated")[3] is the rapid transit system serving the city of Chicago and some of its surrounding suburbs, in
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Gradients, Poisson's Equation and Light Transport | Two Minute Papers #20
Photorealistic rendering (also called global illumination) enables us to see how digital objects would look like in real life. It is an amazingly powerful tool in the hands of a professional artist, who can create breathtaking images or animations with. However, images created with these t
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Blender Rendering - Top 7 LuxRender Features
LuxRender is a completely free, open source, physically based renderer with many contributors led by Jean-Philippe Grimaldi. I believe it is one of the best renderers out there for Blender, 3Ds Max and Maya. The author of the Hotel Lobby scene is Peter Sandbacka. Some of the main benefits
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Beautiful Results From 30 Years Of Light Transport Simulation! ☀️
❤️ Check out Lambda here and sign up for their GPU Cloud: https://lambdalabs.com/papers 📝 The paper "Specular Manifold Sampling for Rendering High-Frequency Caustics and Glints" is available here: http://rgl.epfl.ch/publications/Zeltner2020Specular My rendering course is available here,
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How To Steal a Lost Election With Gerrymandering | Two Minute Papers #104
Gerrymandering, is the process of manipulating electoral district boundaries to turn the tide of an election. There are efficient mathematical techniques to optimally solve such a problem and we'll see how the different electoral districts in the US evolved over the last 20 years as a resu
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Riding the Chicago L Train - 6x - Chicago’s Northside to the Downtown Loop – Chicago Illinois
Riding the Chicago L Train Brown Line 6x – Chicago’s North End (Fullerton) to the Downtown Loop – Chicago Illinois The Chicago 'L ' (sometimes written as "L" or "el", short for "elevated")[3] is the rapid transit system serving the city of Chicago and some of its surrounding suburbs, in t
From playlist Trolleys Trams Subways Buses & Taxis
TU Wien Rendering #35 - Stochastic Progressive Photon Mapping
Photon mapping is working great for a variety of scenes. Ideally, we would like to have a large number of photons for caustics, indirect illumination, etc. but having only a finite amount of photons in our photon maps introduces problems. To remedy this, Toshiya Hachisuka came up with Stoc
From playlist TU Wien Rendering / Ray Tracing Course