PathTracer Learning — Master Index

• A deep-dive learning graph for building a GPU path tracer in Godot, based on the NVPathtracer contributor discussions and modern rendering research.
• This graph covers everything from foundational math to Vulkan ray tracing pipelines and Godot engine internals.

Learning Phases

• PathTracer Learning - Phase 1 - Math for Graphics
  • Vectors, matrices, coordinate systems, radiometry, probability theory
• PathTracer Learning - Phase 2 - CPU Ray Tracing
  • Build a software ray tracer first — understand the algorithm before GPU
• PathTracer Learning - Phase 3 - GPU and Vulkan
  • Vulkan ray tracing pipeline, shader binding tables, acceleration structures
• PathTracer Learning - Phase 4 - Godot Internals
  • RenderingDevice, RenderSceneBuffers, how Godot’s renderer is structured
• PathTracer Learning - Phase 5 - Advanced Topics
  • ReSTIR, DLSS, denoising, production-quality rendering

Key Algorithm Pages

• PathTracer Learning - Path Tracing Algorithm
  • The core rendering equation and how path tracing solves it
• PathTracer Learning - BLAS and TLAS
  • Bottom-level and top-level acceleration structures for RT
• PathTracer Learning - Vulkan RT Pipeline
  • VK_KHR_ray_tracing_pipeline — stages, SBT, ray generation
• PathTracer Learning - DLSS and Denoising
  • Temporal accumulation, DLSS 3.5 Ray Reconstruction
• PathTracer Learning - ReSTIR
  • Reservoir-based spatiotemporal importance resampling

Math & Radiometry Concepts

• PathTracer Learning - Concept - Dot Product
• PathTracer Learning - Concept - Cross Product
• PathTracer Learning - Concept - Solid Angle
• PathTracer Learning - Concept - Radiometry
• PathTracer Learning - Concept - Monte Carlo Integration
• PathTracer Learning - Concept - Importance Sampling
• PathTracer Learning - Concept - MIS

Geometry & Intersection Concepts

• PathTracer Learning - Concept - Ray Definition
• PathTracer Learning - Concept - Ray-Triangle Intersection
• PathTracer Learning - Concept - AABB
• PathTracer Learning - Concept - BVH Construction
• PathTracer Learning - Concept - BVH Traversal
• PathTracer Learning - Concept - Camera Model

Shading & Material Concepts

• PathTracer Learning - Concept - BRDF
• PathTracer Learning - Concept - Microfacet Theory
• PathTracer Learning - Concept - Fresnel Effect
• PathTracer Learning - Concept - Normal Mapping
• PathTracer Learning - Concept - Environment Map

Path Tracing Concepts

• PathTracer Learning - Concept - Russian Roulette
• PathTracer Learning - Concept - Next Event Estimation
• PathTracer Learning - Concept - Temporal Accumulation
• PathTracer Learning - Concept - Temporal Rejection
• PathTracer Learning - Concept - Tone Mapping
• PathTracer Learning - Concept - Anti-Aliasing

Vulkan Concepts

• PathTracer Learning - Concept - Async Compute
• PathTracer Learning - Concept - Device Address Bit

Reference

• PathTracer Learning - Books and Tutorials
• PathTracer Learning - Chat Analysis
  • Notes from the actual Godot NVPathtracer contributor chat

Projects

• PathTracer Learning - Project - Math Library
• PathTracer Learning - Project - CPU Path Tracer
• PathTracer Learning - Project - Vulkan RT