ti-raytrace

• The project is powered by Taichi programming language

core tech overview

• lvbh
• disney brdf
• bdpt
• spectral rendering
• rgb upsample spectral
• sky light

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How to run

• First config your anaconda workspace, and open the anaconda prompt

• Second you need install dependency

  pip install -r requirements.txt

• Last you type

  ti Main.py

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Some image produced by this project

Bidirectional Path Tracing

sky light simulation

spectral render

• The red color is produced by spd below

• produce a d65 cornell box

• using a luxocre example file
• procude prism rainbow

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Performance

• 100000 triangle mesh get 30fps with 2070super

Other algorithm:

• radix sort

• morton 3d code generation

• compact & downweep

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Reference

• Nvidia 2012: Maximizing Parallelism in the Construction of BVHs,Octrees, and k-d Trees

• Lauterbach 2009:Fast BVH Construction on GPUs

• An Analytic Model for Full Spectral Sky-Dome Radiance. ACM TOG 31(4)

• Hero wavelength spectral sampling.Eurographics Symposium on Rendering.2014

• A Low-Dimensional Function Space for Efficient Spectral Upsampling.2019

• Towards Bidirectional Path Tracing at Pixar.2016