Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/sebh/UnrealEngineSkyAtmosphere
Unreal Engine Sky Atmosphere Rendering Technique
https://github.com/sebh/UnrealEngineSkyAtmosphere
Last synced: 9 days ago
JSON representation
Unreal Engine Sky Atmosphere Rendering Technique
- Host: GitHub
- URL: https://github.com/sebh/UnrealEngineSkyAtmosphere
- Owner: sebh
- License: mit
- Created: 2020-06-02T20:05:37.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2022-09-11T12:50:14.000Z (about 2 years ago)
- Last Synced: 2023-11-07T13:05:41.082Z (almost 1 year ago)
- Language: C++
- Homepage: https://www.unrealengine.com
- Size: 1.84 MB
- Stars: 648
- Watchers: 31
- Forks: 61
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome_unreal_engine_4_-_5 - Sky Atmosphere
- awesome_unreal_engine_4_-_5 - UnrealEngineSkyAtmosphere
README
# [Unreal Engine](https://www.unrealengine.com) Sky Atmosphere Rendering Technique
This is the project accompanying the paper `A Scalable and Production Ready Sky and Atmosphere Rendering Technique` presented at [EGSR 2020](https://egsr2020.london/program/).
It can be used to compare the new technique proposed in that paper to [Bruneton et al.](https://github.com/ebruneton/precomputed_atmospheric_scattering) as well as to a real-time path tracer.
The path tracer is using a simple and less efficient noise because I was not sure I could share noise code I had before.
The technique is used to render sky and atmosphere in [Unreal Engine](https://www.unrealengine.com).
Build the solution
1. Update git submodules (run `git submodule update --init`)
2. Open the solution
3. Make sure you select a windows SDK and platform toolset you have locally for both projects
4. In Visual Studio, change the _Application_ project _Working Directory_ from `$(ProjectDir)` to `$(SolutionDir)`
5. Select Application as the startup project, hit F5
Runtime keys:
- SHIFT + mouse to look around
- CTRL + mouse to move the sun around
- C to capture a screenshot
- T toggle between ray-marching and path tracing (disables the multiple scattering approximation when switch to path tracing)
- F5/F9 to save/load a state
Submodules
* [imgui](https://github.com/ocornut/imgui) V1.62 supported
* [tinyexr](https://github.com/syoyo/tinyexr)
About the code:
* The code of Eric Bruneton has been copied with authorization from his [2017 implementation](https://ebruneton.github.io/precomputed_atmospheric_scattering/).
* The code in this repository is provided in hope that later work using it to advance the state of the art will also be shared for every one to use.
* The code has been built from using the [Dx11Base](https://github.com/sebh/Dx11Base) demo/test platform.
* RenderSkyRayMarching.hlsl contains the ray marcher building the different LUTs for the new technique.
* RenderSkyPathTracing.hlsl contains the basic volumetric path tracer. It is matching PBRT and Mitsuba output for [other participating media tests](https://twitter.com/SebHillaire/status/1076144032961757185). It could be improved by really following the Radiance transfert Equation path integral as a loop for each event: currently we only handle participating media and intersection with the planet as a special case.
* This code has been tested on Windows only with visual studio (no build script generation)
Thanks to [Epic Games](https://www.epicgames.com) for allowing the release of this source code.
The code is provided as is and no support will be provided.
I am still interested in any feedback, and we can discuss if you [contact me via twitter](https://twitter.com/SebHillaire).
[Seb](https://sebh.github.io/)