Next Path Tracer Release

[devshgraphicsprogramming]

Vulkan Port

• [ ] Use single 64-sized workgroup compute shader to do iterative raytracing with ray queries

Usability

• [x] No more visbuffer raster
• [ ] Fractional Spp Rendering
• [ ] Raygen from Perspective Camera, Ortho or a Custom Warp Function (GLSL func)
• [ ] Headless mode (no window)
• [ ] Resize display window to fit aspect ratio
• [ ] Render to multiple borderless windows at once (VR Cave = compound sensor)

Explicit Light Sampling

• [ ] MIS for NEE
• [x] Improved Envmap Importance Sampling
• [ ] Rejection AABB Solid Angle Sampling
• [ ] Many light rendering (NEE++ or ReSTIR or Nvidia SDK)

Testing

• [ ] Compare daily_pt.xml in quality and speed

Quality

• [x] Schussler et al. BxDF fixes for bumpmaps and smooth shading normals
• [ ] Covariance Tracing
• [x] Reweighting Fireflies

Perf

• [ ] Tag wholly smooth materials and skip NEE
• [ ] Russian Roulette for NEE
• [ ] Optimize normal vertex attribute presence across all loaders in the engine
• [ ] Only allocate and fetch Normals and UVs for materials that need them
• [ ] Single BLAS for non-instanced meshes
• [ ] Deinstancing of (lowpoly) meshes according to heuristic
• [ ] SAH BVH mesh preprocessing for breaking bad batches
• [ ] OBB computation and KD-tree splitting of emitters
• [ ] Stochastic Alpha Testing Anyhit shader (special stream in material compiler)