Wrote the Shader in Unity using HLSL and Shader Lab.
Created an addon in Blender to automate workflow and increase iteration speed of baking lightmaps.

Assets are baked in Blender and rendered in VR using Unity 2022.

This approach reduced the total number of textures used for an environment asset from 5 to 4 in comparison to baking lightmaps in Unity. It helped reduce memory bandwidth while improving the quality of the lightmaps. The down side is the lightmap baking happens in a separate application which increased the time spent on lightmaps. For our use case, it was an improvement to performance and quality.