Industrial Light AOV Splitter is a Blender add-on from Roland-Vyens for generating light AOVs. With one click it separates light groups into four channels—diffuse, specular, transmission, and volume—producing passes named in the style of diffuse_env and specular_env. The developer describes the aim as industry-standard controllability during the compositing stage.
The developer recommends pairing it with Industrial AOV Connector. A Nuke Python script is provided on GitHub to auto shuffle and combine the lightgroup AOVs together, though it works only with EXRs produced by Industrial AOV Connector. The developer notes this is a workaround rather than the proper way to handle separated light AOV channels.
The add-on is compatible with Blender 4.2 LTS and newer and requires no special permissions. It is released under the GNU General Public License v3.0 or later and is listed here as free. For native light material AOVs, the developer also points to the Industrial CG Platform Blender branch on GitHub.