CPU path tracer written in Rust.

Licensed under the GPLv3.

Use a EXR viewer such as tev to view output images.

Features (WIP):

• Spectral rendering (including wavelength-dependent path generation) with Hero Wavelength Spectral Sampling
• Spectral upsampling (Jakob et al.)
• Parallel and progressive refinement
• Multiple importance sampling
• Russian roulette
• Next event estimation
• HDR environment maps

TODO:

• Fix progressive rendering
• Add README image
• Clean up tile
• SIMD more things (matmul, vec3, Spectrum eval, upsampling)
• Analytic light integration test (Le = 0.5, f = 0.5, radiance should be 1)
• More shapes
• Serialize scene from RON
• BVH / other spatial accel
• MTL file handling
• Reconstruction filtering
• Adaptive sampling (?)
• Direct image output
• Tonemapping options (ACES)
• Camera lens sim + vigenetting + DoF
• Volume rendering
• Motion blur / animation
• Real time rasterizing preview
• Own PNG / HDR code
• PGO
• Clean up normal offseting
• MIS compensation
• Triangles
• Coherent ray bundles
• SDF shapes
• Mipmapping / texture filtering
• Catmull-Clark
• Denoising
• License