Path tracer

Summary

A real-time 3D path tracing engine. Built with Rust and wgpu.

Features

• flying camera to move around
• progressive rendering (If you stand still the engine will start to accumulate previous frames over time and average the pixels together. This is a form of noise reduction.)
• convert equirectangular HDRIs to cubemaps (useful for rendering the sky)
• Bounding Volume Hierarchy for traversing meshes in logarithmic time
• user interface for making changes at runtime, such as:
  • adjusting the renderer's settings
  • modifying the scene (adding and removing objects, modifying their properties, etc.)
• select objects with the cursor (this currently only works for spheres, not complex meshes)
• load models from .obj files

Future plans

• saving and loading scene data
• implementing textures
• implementing a denoiser(?)
• moving the whole thing to Vulkan and utilize the raytracing cores on RTX GPUs
• DLSS (??)

Running and building

You will need the Rust toolchain. (You can install it using rustup.)

Running (in debug mode):

cargo run

Building in release mode:

cargo build --release

Progressive rendering demo

progressive_rendering_demo_cropped.mp4

Gallery