Simple Open-source Ray Tracing

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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 others.

Following features are implemented in SORT,

• 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, Distribution BRDF, DreamWorks Fabric BRDF, Transparent).
• Subsurface Scattering.
• Fur, Hair.
• Volumetric Rendering.
• SORT Shading Language
• Depth of Field.
• Multi-thread rendering, SIMD(SSE,AVX,Neon) Optimized.
• Blender 2.8 Plugin.
• Cross-platform (Windows x64, Windows Arm64, Ubuntu x64, Ubuntu Arm64, Intel Mac, Mac Arm64).

Features added to SORT since 2023 are not open source. These include:

• Fiber-based job system.
• Asset build pipeline.
• pbrt-v4 scene loader.
• Improved shading language with support for procedural derivatives.