TODO.md

TODO

Features

• P1: Recursive refraction
• P1: Depth of field
• P1: Features from "Ray tracing in a weekend" series
  • Ray tracing in a weekend
  • Ray tracing: the next week
  • Ray tracing: the rest of your life
• P1: Volumetrics
• P1: Textures
• P2: Add denoiser (https://github.com/OpenImageDenoise/oidn)
• P3: Other camera types, like orthographic
• P3: Disney BRDF
• P3: GUI scene viewer (imgui?)
• P2: Double precision support?
• P3: Add model loading test

Scenes

• Utah teapot
• Stanford bunny
• pbrt scenes? https://benedikt-bitterli.me/resources/

Performance improvements

• P0: GPU support?
• P3: Adaptive sampling
• P3: Bidirectional path tracing
• P3: Include an end bound on ray intersections to avoid costly intersection tests that are further away than already-known intersections
• P4: Metropolis light transport

Bugs

• P1: Some parts of the lighting calculations don't take orientation into account (so lights illuminate things behind them)
• P1: Roughness cannot be set to 0 (or 1?) without black results

DONE

• Add surface area heuristic to BVH
• Acceleration structure (BVH)
• Traverse BVH children in an intelligent way, updating max_distance to avoid intersecting farther bounding boxes. Use the sign of the ray's direction vector for the coordinate axis along which the BVH node was split
• Per-vertex normals
• Area light source / stratified sampling
• Antialiasing
• Cornell box
• Stanford dragon
• Tone mapping of the output image (gamma correction?)
• Golden testing framework
• P0: Allow separate rendering of direct and bounce light
• P1: Add multithreading support
• P0: MIS
• P1: Support for a common file format (obj, glTF, USD?)
• P3: Allow configuration of random seed