So my previous attempts to reduce voxel world space coordinates to a unique set for voxel lighting passes was complete folly due to my ignorance of shader programming and not being able to find useful information online.

This video showed me exactly what I needed to know:  frozein@Youtube - Adding RAYTRACED LIGHTING to my Voxel Engine

[I've delete my devlog folly entries because they are just embarrassing knowing what I know now.]