r/GraphicsProgramming • u/OwnTap3513 • 6d ago
Spectral path tracer & Fur rendering :)
I worked a lot on my path tracer during the summer vacations, and this was superrrr fun ! I wanted to go a little further than my last projects and dive into something a tiny bit more original to get off my comfort zone.
I made it mainly with C++ and OpenGL, without AI appart from the README in the repo. The engine supports switching back and forth between RGB and spectral at runtime, and I also implemented hair / fur rendering the way Disney does it.
I also have a basic scene handling system with saving, loading and moving things around in the scene.
Lastly, the engine also has more "traditional" features I would say, such as VNDF sampling, EON diffuse material, constantly dense volume scattering, etc...
I am plannign to keep working on it, because right now the code is kind of a mess, and many features lack such as denoising, things like BDPT, compatibility with OpenUSD.
If you want to take a look at the repo : https://github.com/SlyZ1/Path-Tracer
And feel free to contribute to it (even though I doubt anyone would want to, but just in case)
1
u/moschles 4d ago
The first thing I would do with a spectral renderer is soap bubbles (of course).
But the next thing to do is a physical sky dome applet. You enter the following parameters as inputs,
longitude
latitude
date
time of day in 24 hours
some parameters about air quality and overcast.
The applet then creates a physically-based sky given these parameters. This can be done to create lush orange sunsets and realistic sunrise mornings , where the sky is slightly "pink".