# Fast Photorealistic Fur and Hair With Cone Tracing | Two Minute Papers #126 ## Метаданные - **Канал:** Two Minute Papers - **YouTube:** https://www.youtube.com/watch?v=-all65C-dh0 - **Дата:** 08.02.2017 - **Длительность:** 2:46 - **Просмотры:** 20,411 - **Источник:** https://ekstraktznaniy.ru/video/14714 ## Описание Our Twitter feed is available here: https://twitter.com/karoly_zsolnai The paper "Cone Tracing for Furry Object Rendering" is available here: http://gaps-zju.org/mlchai/resources/qin2014cone.pdf http://gaps-zju.org/mlchai/ WE WOULD LIKE TO THANK OUR GENEROUS PATREON SUPPORTERS WHO MAKE TWO MINUTE PAPERS POSSIBLE: Sunil Kim, Daniel John Benton, Dave Rushton-Smith. https://www.patreon.com/TwoMinutePapers Subscribe if you would like to see more of these! - http://www.youtube.com/subscription_center?add_user=keeroyz Music: Dat Groove by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://audionautix.com/ Thumbnail background image credit: https://pixabay.com/photo-640498/ Splash screen/thumbnail design: Felícia Fehér - http://felicia.hu Károly Zsolnai-Fehér's links: Facebook → https://www.facebook.com/TwoMinutePapers/ Twitter → https://twitter.com/karoly_zsolnai Web → https://cg.tuwien.ac.at/~zsolnai/ ## Транскрипт ### [] Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér. This is a cone-based ray tracing algorithm for rendering photorealistic images of hair ### Single squirrel [0:06] and furry objects, where the number of hair strands is typically over a hundred thousand. Okay, wait. What do these term mean exactly? Ray tracing means a bona fide light simulation program where we follow the path of many millions of light rays between the light sources and our camera. This usually means that light reflections and refractions, lens blur and defocus are taken into consideration. This feature is often referred to as depth of field, or DoF in short as you can see in the video. ### Hair [0:42] A fully ray traced system like this for hair and fur leads to absolutely beautiful images that you also see throughout this footage. So what about the cone-based part? Earlier, we had an episode about Voxel Cone Tracing, which is an absolutely amazing technique to perform ray tracing in real time. It works by replacing these infinitely thin light rays with thicker, cone-shaped rays which reduces the execution time of the algorithm significantly, at the cost of mostly a minor ### Teaser [1:12] sometimes even imperceptible degradation in image quality. Since the hair strands that we're trying to hit with the rays are extremely thin, and cone tracing makes the rays thicker, extending this concept to rendering fur without nontrivial extensions is going to be a fruitless endeavor. The paper contains techniques to overcome this issue, and an efficient data structure is proposed to store and find the individual hair strands, and a way to intersect these cones with the fibers. The algorithm is also able to adapt the cone sizes to the scene we have at hand. The previous techniques typically took at least 20 to 30 minutes to render one image, and with this efficient solution, we'll be greeted by a photorealistic image at least four to six times quicker, in less than 5 minutes, while some examples were completed in less than a minute. I cannot get tired of seeing these tiny photorealistic furry animals in Pixar movies and I am super happy to see there's likely going to be much, much more of these. By the way, if you're subscribed to the channel, please click the little bell next to the subscription icon to make sure that you never miss an episode. Also, you can also follow us on twitter for updates. Thanks for watching and for your generous support, and I'll see you next time!