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RELEASE_NOTES.md

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Version 0.4.0

Multiple frontends and features:

  • igexplorer Frontend for glare evaluation
  • igview Interactive frontend for scene exploration
  • igcli Command-Line tool for final renders
  • igutil Command-Line tool to convert between images
  • igevalglare Command-Line tool for glare evaluation (experimental)
  • igbsdfinspector Basic viewer for Klems and Tensor BSDFs (experimental)
  • Python API using Python 3.8 and above
  • Blender extension
  • Cuda accelerated
  • Denoising with Intel Open Image Denoise (v2.3.1)

Highlights

  • The interactive frontends moved from SDL2 to GLFW and OpenGL, which removes a runtime dependency and fixes the window handling on all platforms.
  • Experimental path guiding, including a one-lobe vMF variant, sun-focused guiding and learned guiding for environment maps.
  • Glare evaluation is now part of the runtime and no longer depends on the color space of the input.
  • Reworked AOV handling with support for mono AOVs.
  • The Python module is built against the stable ABI, so a single wheel works for Python 3.8 and above.
  • Ignis falls back to the CPU when a GPU target fails to initialize.
  • Hardened scene loading: the glTF, PLY, Klems, TensorTree and serialized mesh parsers now reject malformed and out-of-range input instead of reading past their buffers.
  • Several correctness fixes for TensorTree and Klems BSDFs, validated against Radiance.

Download

This release has a binary for Windows with CUDA support included. You can download the installer version (.exe). Keep in mind that Ignis is still in Beta and only igexplorer and igbsdfinspector can be opened without the terminal.

Status

This is the first release built and published automatically from a version tag.

Progressive photon mapping is currently disabled and the guiding techniques are experimental. As always, expect rough edges.