https://github.com/knightcrawler25/glsl-pathtracer

A toy physically based GPU path tracer (C++/OpenGL/GLSL)
https://github.com/knightcrawler25/glsl-pathtracer

bsdf bvh disney glsl gpu linux opengl path path-tracer path-tracing pathtracer pathtracing ray ray-tracing raytracer tracer tracing windows

Last synced: about 2 months ago
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A toy physically based GPU path tracer (C++/OpenGL/GLSL)

• Host: GitHub
• URL: https://github.com/knightcrawler25/glsl-pathtracer
• Owner: knightcrawler25
• License: mit
• Created: 2018-11-09T15:10:23.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2024-02-09T17:38:14.000Z (over 1 year ago)
• Last Synced: 2025-05-15T14:08:34.889Z (about 2 months ago)
• Topics: bsdf, bvh, disney, glsl, gpu, linux, opengl, path, path-tracer, path-tracing, pathtracer, pathtracing, ray, ray-tracing, raytracer, tracer, tracing, windows
• Language: C++
• Homepage:
• Size: 121 MB
• Stars: 1,948
• Watchers: 43
• Forks: 188
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        

GLSL-PathTracer

==========

A physically based path tracer that runs in a GLSL fragment shader.

![Jinx](./screenshots/Jinx.jpg)

![Tropical Island](./screenshots/Tropical_Island.jpg)

Features

--------

- Unidirectional path tracer

- Two-level BVH for instancing

- Disney BSDF

- Texture mapping (Albedo, Metallic-Roughness, Normal, Emission)

- Analytic lights (Spherical, Rectangular, Directional)

- Image based lighting

- Multiple importance sampling

- Tile rendering

- OpenImageDenoise

- Stochastic alpha testing

- MagicaVoxel style homogeneous volumes

- GLTF/GLB support (In progress)

Build Instructions

--------

Please see INSTALL-WIN.txt for the build instructions for Windows and INSTALL-LINUX.txt for Linux

Sample Scenes

--------

A couple of sample scenes are provided in the repository. Additional scenes can be downloaded from here:

https://drive.google.com/file/d/1UFMMoVb5uB7WIvCeHOfQ2dCQSxNMXluB/view

Gallery

--------

![Monster](./screenshots/Monster.jpg)

--------

![WW2](./screenshots/ww2.jpg)

--------

![RenderMan Swatch](./screenshots/Renderman_swatch.jpg)

--------

![Dragon](./screenshots/dragon.jpg)

--------

![Stormtrooper](./screenshots/stormtrooper.jpg)

--------

![Panther](./screenshots/panther.jpg)

--------

![Crown](./screenshots/crown.jpg)

--------

![Mustang](./screenshots/Mustang.jpg)

--------

![Mustang_Red](./screenshots/Mustang_Red.jpg)

--------

![Hyperion](./screenshots/hyperion.jpg)

--------

![Ajax](./screenshots/ajax_materials.jpg)

--------

![Dining Room](./screenshots/DiningRoom.jpg)

--------

![Rank3PoliceUnit](./screenshots/rank3police_color_corrected.jpg)

--------

![Staircase](./screenshots/staircase.jpg)

--------

![Substance Boy](./screenshots/MeetMat_Maps.jpg)

References/Credits

--------

- A huge shout-out to Cedric Guillemet (https://github.com/CedricGuillemet) for cleaning up the code, adding the UI, integrating ImGuizmo, cmake and quite a lot of fixes.

- Tinsel Renderer (https://github.com/mmacklin/tinsel) A modified version of the scene description & loader from that project is used here.

- Ray Tracing in One Weekend (https://github.com/petershirley/raytracinginoneweekend) Peter Shirley's excellent book introductory book on raytracing which helped me get started on this project.

- Erich Loftis's THREE.js PathTracer (https://github.com/erichlof/THREE.js-PathTracing-Renderer).

- OptiX Introduction Samples (https://github.com/nvpro-samples/optix_advanced_samples/tree/master/src/optixIntroduction)

- Mitsuba Renderer (https://github.com/mitsuba-renderer/mitsuba) Reference for validation.

- PBRT-v3 (https://github.com/mmp/pbrt-v3) which provides an endless source of knowledge. The online book is a gift that keeps giving.

- Model links/credits are in the assets folder (See: Model Credits.txt)