# \#path-tracing

**URL:** https://discourse.threejs.org/tag/path-tracing/1391.md

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## [Implement three-gpu-pathtracer](https://discourse.threejs.org/t/implement-three-gpu-pathtracer/55735)

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**Author:** [@ciggy\_LA](https://discourse.threejs.org/u/ciggy_LA)\
**Replies:** 1\
**Last updated:** [September 12, 2023, 9:24am UTC](https://discourse.threejs.org/t/implement-three-gpu-pathtracer/55735 "2023-09-12T09:24:43Z")

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Hi All, I’m looking for a developer to help implementing the three-gpu-pathtracer from gkjohnson We have some issues with some models with particular PBR maps. Feel free to reach out for more details. Thank you

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## [Geometry turns black, when scene.updateMatrixWorld() applied](https://discourse.threejs.org/t/geometry-turns-black-when-scene-updatematrixworld-applied/54022)

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**Author:** [@JerryI](https://discourse.threejs.org/u/JerryI)\
**Replies:** 1\
**Last updated:** [July 18, 2023, 12:50am UTC](https://discourse.threejs.org/t/geometry-turns-black-when-scene-updatematrixworld-applied/54022 "2023-07-18T00:50:48Z")

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I am not sure if it connected with Path rendering engine or with three.js. So… Matrix transformation applied on a scene (or any of its group) does not show any effect. However, when method updateMatrixWorld is applied o…

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## [Question about a project I saw (three-gpu-pathtracer)](https://discourse.threejs.org/t/question-about-a-project-i-saw-three-gpu-pathtracer/47329)

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**Author:** [@Vikms95](https://discourse.threejs.org/u/Vikms95)\
**Replies:** 20\
**Last updated:** [February 2, 2023, 5:18pm UTC](https://discourse.threejs.org/t/question-about-a-project-i-saw-three-gpu-pathtracer/47329 "2023-02-02T17:18:10Z")

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Hi all. I’ve been looking at the examples within the Three.js webpage and I stumbled across this: example I know this is using a library which enables path tracing for the scene it is applied to, but I would like to kno…