Path tracer

Summary

A real-time 3D path tracing engine, running on the GPU, 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, thus greatly reducing noise.)
• converting equirectangular HDRIs to cubemaps (which can then be used for the skybox)
• storing polygons in a Bounding Volume Hierarchy, so they can be traversed 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.)
• selecting objects with the cursor (this currently only works for spheres, not complex meshes)
• loading models from .obj files

Future plans

• saving and loading scene data
• implementing textures
• implementing a denoiser(?)
• moving the whole thing to Vulkan, making it possible to 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

Gallery