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SORT, short for Simple Open-source Ray Tracing, is my personal cross platform ray tracing renderer. It is a standalone ray tracing program, while works well in Blender as a renderer plugin. Simliar to other open source ray tracer, like PBRT, luxrenderer, SORT is also a physically based renderer. However, since it is a solo project that I worked on in my spare time, it is way simpler comparing with its peers.

This is just a brief introduction of SORT. For further detail, please check out SORT main page.


Here are the features implemented so far:

  • Integrator. (Whitted ray tracing, direct lighting, path tracing, light tracing, bidirectional path tracing, instant radiosity, ambient occlusion)
  • Spatial acceleration structure. (OBVH, QBVH, BVH, KD-Tree, Uniform grid, OcTree)
  • BXDF. (Disney BRDF, Lambert, LambertTransmission, Oran Nayar, MicroFacet Reflection, Microfacet Transmission, MERL, Fourier, AshikhmanShirley, Modified Phong, Coat, Blend, Double-Sided, DistributionBRDF, DreamWorks Fabric BRDF, Transparent)
  • Subsurface Scattering
  • Fur, Hair
  • Volumetric Rendering
  • Tiny Shading Language
  • Depth of Field
  • Multi-thread rendering, SIMD(SSE,AVX) optimized
  • Blender 2.8 plugin
  • Cross-platform (Windows, Ubuntu, MacOS)


Following are some examples of images generated by SORT Image Asset courtesy of Alex Treviño Image Asset courtesy of Morgan McGuire. Image Image Asset courtesy of rico cilliers. Image Asset courtesy of ScottGraham. The above rendered image is not used for any commercial purposes. Image Asset courtesy of MaTTeSr. Image Asset courtesy of Jay Image