Changelog¶

Eradiate Mitsuba — Changelog¶

Changes made to the Eradiate fork of Mitsuba 3 since the latest release (v0.4.3, 2026-03-18).

eovolpath integrator: New volumetric path integrator that replicates and extends the upstream volpath integrator. Introduces the DDIS (Detector Directional Importance Sampling) method for improved variance reduction in participating media (src/eradiate_plugins/integrators/eovolpath.cpp).
Extremum plugins (extremum_grid, extremum_spherical): New plugin type that computes local majorant/minorant bounds for a medium, enabling distance sampling using local majorants rather than a global majorant. Two implementations are provided:
- extremum_grid — grid-based extremum tracking.
- extremum_spherical — spherical-coordinates-based extremum tracking.
These plugins expose a Python API and are accompanied by a comprehensive unit test suite.

ExtremumSegment refactor: Separated extremum traversal algorithms from sample_segment into dedicated free functions, improving modularity and preparing the codebase for future tracking algorithms. ExtremumSegment now stores a Vector2f and exposes majorant / minorant as getters. (include/mitsuba/render/eradiate/extremum_segment.h)
Optical thickness rename: Renamed the tau symbol to ot (optical thickness) throughout the extremum plugins and medium code for consistency with Eradiate’s notation conventions.
volume.h additions: Extended Volume header with helpers required by the extremum plugins.

tabphase_polarized: Fixed out-of-sync node handling that could produce incorrect results for polarized tabulated phase functions. (src/eradiate_plugins/phase/tabphase_polarized.cpp)