eonil/weekend-raytracing-swift

WeekendRaytracing

Eonil, Hoon H.. 2024.

This is experimental implementation for a path tracer. Based on a great book "Ray Tracing in One Weekend".

To do

• Consider using Intel's OIDN for denoising.
  • https://www.openimagedenoise.org

Idea

See also

• DDGI.

  • https://morgan3d.github.io/articles/2019-04-01-ddgi/overview.html
  • Almost 1st gen. GI. Easy, cheap and clean.
  • Visibility check is the key.
    • Prevent shadow leak: Back-face hit culling, and ignore hitting with back-face.
    • Prevent light leak: Back-face hit culling.

• Nvidia Quake 2 RTX

  • Pure path ray tracing based rendering.
  • Direct + indirect + specular + denoiser.
  • Steam download
  • Keynote

• Manifold Exploration (for offline rendering)

  • YouTube short introduction (link))
  • Paper & Video (link))

• Raytracing in Hybrid Real-Time Rendering (EA)

  • http://h3.gd/raytracing-in-hybrid-real-time-rendering/

• "ReSTIR". The latest GI technology.

  • Spatial & temporal sample re-using.
  • For motion blur, we also can re-use the samples over sub-frames.
  • They are very likely re-used.
  • Bleeding edge is "Area ReSTIR". (2024)
  • If "ReSTIR" can be expanded to "area light", it also can be expanded to motion blur. Which just samples over time.

• "Octahedral Encoding".

  • https://www.readkong.com/page/fullscreen/octahedron-environment-maps-6054207