Differentiable RayTracing in Julia
Author avik-pal
87 Stars
Updated Last
13 Days Ago
Started In
March 2019


CI codecov Latest Docs status DOI

A Ray Tracer written completely in Julia. This allows us to leverage the AD capablities provided by Zygote to differentiate through the Ray Tracer.


This package is registered. So open up a Julia 1.3+ repl and enter the pkg mode.

julia> ]
(v1.3) pkg> add RayTracer

To use the master branch (not recommended) do.

julia> ]
(v1.3) pkg> add RayTracer#master



Follow the instructions below to run individual examples or use examples/script.sh to run all of them together.

First we need to get the versions of the packages used when these examples were written.

$ cd examples
$ julia --color=yes -e "using Pkg; Pkg.instantiate()"

Now we can run any of the file we need by julia --project=. --color=yes "/path/to/file"

Running Individual Examples

wget https://raw.githubusercontent.com/McNopper/OpenGL/master/Binaries/teapot.obj
$ mkdir meshes
$ cd meshes
$ wget https://raw.githubusercontent.com/avik-pal/RayTracer.jl/master/test/meshes/sign_yield.obj
$ wget https://raw.githubusercontent.com/avik-pal/RayTracer.jl/master/test/meshes/sign_yield.mtl
$ cd ..

$ mkdir textures
$ cd textures
$ wget https://raw.githubusercontent.com/avik-pal/RayTracer.jl/master/test/textures/wood_osb.jpg
$ wget https://raw.githubusercontent.com/avik-pal/RayTracer.jl/master/test/textures/sign_yield.png
$ cd ..

This example requires a few arguments to be passes from command line. Chack them using

julia --project=. --color=yes "performance_benchmarks.jl" --help

$ wget https://raw.githubusercontent.com/tejank10/Duckietown.jl/master/src/meshes/tree.obj 
$ wget https://raw.githubusercontent.com/tejank10/Duckietown.jl/master/src/meshes/tree.mtl

Additional Examples

Duckietown.jl uses RayTracer.jl for generating renders of a self-driving car environment. For more complex examples of RayTracer, checkout that project.


This software was developed as part of academic research. If you would like to help support it, please star the repository. If you use this software as part of your research, teaching, or other activities, we would be grateful if you could cite the following:

    title={{RayTracer.jl: A Differentiable Renderer that supports Parameter Optimization for Scene Reconstruction}},
    author={Avik Pal},


These are not listed in any particular order

  • Add more types of common objects (use mesh rendering for this)
  • Add support for rendering arbitrary mesh
  • GPU Support using CuArrays (partially supported in ap/gpu branch)
  • Inverse Rendering Examples
  • Application in Machine Learning Models through Flux (work in progress)
  • Texture Rendering
  • Make everything differentiable:
    • Triangle Mesh

Used By Packages

No packages found.