I did offer some strong clues with the above. Yes, I added distinct fill shapes as mentioned, then set the fill differently to provide the different fill effects. I did the using the ‘Offset Shapes’ tool. Then set that new shape on a different layer.
Additionally, a solid understanding of how LightBurn uses boundaries to toggle fills on a layer.
Below, I will add a distinct fill to Merv’s shirt using the ‘Offset Shapes’. (click on image to zoom)